Answer:continental drift
Explanation:
Answer:
Option (B)
Explanation:
The continental drift is defined as the shifting of the continents over the large water body with respect to the poles. These continents moved from one place to another across the line of different latitudes and longitudes, experiencing various types of climatic conditions, due to which the ocean water currents has been significantly affected. This presence and continuous motion of continents affects the direction of the ocean currents that moves from the equatorial to the polar region.
Thus, over the earth's geological history, the ocean currents are undergoing changes due to the continental drifting.
Hence, the correct answer is option (B).
Mitochondrial DNA is found where in relation to the cell?
A. Inside the nucleus
B. Inside the cell, but outside the nucleus
C. Outside the cell
D. Inside the nucleus of bruccal cells
Mitochondrial DNA is found Inside the cell, but outside the nucleus in relation to the cell. Option B
What more should you know about Mitochondrial DNA?Mitochondrial DNA (mtDNA) is a small circular DNA molecule that is found in the mitochondria of eukaryotic cells. Mitochondria are organelles that are responsible for generating energy for the cell. mtDNA is inherited from the mother, and it is not affected by the father's DNA.
mtDNA is different from nuclear DNA in several ways. mtDNA is much smaller than nuclear DNA, and it contains fewer genes. mtDNA is also circular, while nuclear DNA is linear. mtDNA is also more prone to mutation than nuclear DNA.
mtDNA is important for a number of reasons. It is essential for the production of energy in the cell. It is also involved in the apoptosis, or programmed cell death. mtDNA can also be used to diagnose a number of diseases, including mitochondrial disorders and certain types of cancer.
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What is one advantage offshore wind farms have over land wind farms?
Increased wind speed over the ocean. Or more room for other potential uses of the land where wind farms take space.
In an ecosystem, the advantage of offshore wind farms is that it is more likely to get out of sight.
What is an ecosystem?An ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in energy transfer as they feed on each other.As a result of this transfer of matter and energy takes place through the ecosystem .Living organisms also influence the quantity of biomass which is present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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B. Hydrogen sulfide, H2S, is a contaminant in natural gas. It can be removed with the reaction CH4(g) + 2H2S(g) CS2(g) + 4H2(g), ΔH = 232 kJ/mol. How should the following conditions of this reaction be changed to optimize the removal of H2S? Explain your answers.
i. Changing the pressure
ii. Changing the temperature
iii. Changing the H2 concentration
Answer:
I. Changing the pressure:
Increasing the pressure: the amount of H₂S(g) will increase.Decreasing the pressure: the amount of H₂S(g) will decrease.II. Changing the temperature:
Increasing the temperature: the amount of H₂S(g) will decrease.Decreasing the temperature: the amount of H₂S(g) will increase.III. Changing the H₂ concentration:
Increasing the H₂ concentration: the amount of H₂S(g) will increase.Decreasing the H₂ concentration: the amount of H₂S(g) will decrease.Explanation:
Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.
I. Changing the pressure:
When there is an increase in pressure, the equilibrium will shift towards the side with fewer moles of gas of the reaction. And when there is a decrease in pressure, the equilibrium will shift towards the side with more moles of gas of the reaction.For the reaction: CH₄(g) + 2H₂S(g) ⇄ CS₂(g) + 4H₂(g),
The reactants side (left) has 3.0 moles of gases and the products side (right) has 5.0 moles of gases.
Increasing the pressure: will shift the reaction to the side with lower moles of gas (left side), amount of H₂S(g) will increase.Decreasing the pressure: will shift the reaction to the side with lower moles of gas (right side), amount of H₂S(g) will decrease.
II. Changing the temperature
The reaction is endothermic since the sign of ΔH is positive.
So the reaction can be represented as:CH₄(g) + 2H₂S(g) + heat ⇄ CS₂(g) + 4H₂(g).
Increasing the temperature:
The T is a part of the reactants, increasing the T increases the amount of the reactants. So, the reaction will be shifted to the right to suppress the effect of increasing T and the amount of H₂S(g) will decrease.
Decreasing the temperature:The T is a part of the reactants, increasing the T decreases the amount of the reactants. So, the reaction will be shifted to the left to suppress the effect of decreasing T and the amount of H₂S(g) will increase.
III. Changing the H₂ concentration:
H₂ is a part of the products.
Increasing the H₂ concentration:H₂ is a part of the products, increasing H₂ increases the amount of the products. So, the reaction will be shifted to the left to suppress the effect of increasing H₂ and the amount of H₂S(g) will increase.
Decreasing the H₂ concentration:H₂ is a part of the products, decreasing H₂ decreases the amount of the products. So, the reaction will be shifted to the right to suppress the effect of decreasing H₂ and the amount of H₂S(g) will decrease.
Which statement is true about the substances in a mixture?
They change their composition
They retain their chemical properties
They always consist of the same element
They are always in the same state of matter
Answer:
They retain their chemical properties
Explanation:
Answer: They retain their chemical properties
Explanation:
Mixture is a substance which has two or more components which do not combine chemically and do not have any fixed ratio in which they are present.
For example: Air is a mixture which consists of various gases, water vapors and various particles in solid form which are not present in any fixed ratio, do not combine chemically and thus retain their chemical properties.
Thus the only true statement about substances in a mixture is that they retain their chemical properties
PLEASE HURRY! TYSM! BRANLIEST!
Which statements accurately describe short-term environmental changes? Check all that apply. (MULTIPLE ANSWERS!) PLZ BE RIGHT
Short-term environmental changes cause changes in genetic makeup.
Short-term environmental changes do not happen suddenly with little warning.
Short-term environmental changes can occur in minutes to hundreds of years.
Short-term environmental changes do not affect organisms within an ecosystem.
Short-term environmental changes immediately affect organisms in the environment.
Answer:
Short-term environmental changes can cause changes in genetic makeup, Short-term environmental changes can occur in minutes to hundreds of years, short-term environmental changes immediately affect organisms in the environment
Explanation:
Short-term environmental changes happen fast and with power to kill and change many organisms
Answer: Short-term environmental changes causes changes in genetic makeup.
Short-term environmental changes can occur in minutes to hundreds of years.
Short-term environmental changes immediately affect organisms in the environment.
Explanation:
Short-term environment change can be define as changes in the environment the affect or impact of which last for a short duration but can be drastic and may recover with the passage of time. Duration of these changes last for minute to years.
These changes can be manipulate the genome, morphology or physiology of organisms for example the case of short to prolonged exposure of radiations.
The balanced equation for combustion in an acetylene torch is shown below:
2C2H2 + 5O2 → 4CO2 + 2H2O
The acetylene tank contains 35.0 mol C2H2, and the oxygen tank contains 84.0 mol O2.
How many moles of CO2 are produced when 35.0 mol C2H2 react completely?
mol CO2
Answer:
70mol
Explanation:
The equation of the reaction is given as:
2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O
Given parameters:
Number of moles of acetylene = 35.0mol
Number of moles of oxygen in the tank = 84.0mol
Unknown:
Number of moles of CO₂ produced = 35.0mol
Solution:
From the information given about the reaction, we know that the reactant that limits this combustion process is acetylene. Oxygen is given in excess and we don't know the number of moles of this gas that was used up. We know for sure that all the moles of acetylene provided was used to furnish the burning procedure.
To determine the number of moles of CO₂ produced, we use the stoichiometric relationship between the known acetylene and the CO₂ produced from the balanced chemical equation:
From the equation:
2 moles of acetylene produced 4 moles of CO₂
∴ 35.0 mol of acetylene would produced:
[tex]\frac{35 x 4}{2}[/tex] = 70mol
Answer:
70 mol
the next one is 67.2
Explanation:
:) have a great day
A gas has a volume of 800.0 mL at -23.0 degrees Celsius and 300.0 torr. What would the volume of the gas be at 227.0 degrees Celsius and 600.0 torr of pressure?
Answer:
The volume would be 800mL and it shows that it is constant.
Explanation:
Given parameters:
Intial volume of gas V₁ = 800mL
Initial temperature T₁ = -23°C to Kelvin; we use K = °C + 273 = -23 + 273 = 250K
Inital pressure P₁ = 300torr
Final temperature T₂ = 227°C to K = 227 + 273 = 500K
Final pressure P₂ = 600torr
Unknown parameter:
Final volume V₂ = ?
To solve this problem, we use the General gas law or the combined gas law where we assume that n=1, this gives:
[tex]\frac{P_{1} V_{1} }{T_{1} }[/tex] = [tex]\frac{P_{2} V_{2} }{T_{2} }[/tex]
Since the unknown is V₂, we make it the subject of the formula:
V₂ = [tex]\frac{P_{1} V_{1} T_{2} }{P_{2} T_{1} }[/tex]
V₂ = [tex]\frac{300x800x500}{600x250}[/tex]
V₂ = 800mL
After the temperature and pressure changes the final volume of the gas is calculated to be approximately 800.05 mL.
To find the final volume of a gas when given changes in temperature and pressure, we use the combined gas law:
(P₁ * V₁)/T₁ = (P₂ * V₂)/T₂
Here, the variables represent:
P₁ = initial pressureV₁ = initial volumeT₁ = initial temperature (in Kelvin)P₂ = final pressureV₂ = final volumeT₂ = final temperature (in Kelvin)The initial conditions given are:
Volume (V₁) = 800.0 mLPressure (P₁) = 300.0 torrTemperature (T₁) = -23.0°CFirst, convert the temperatures to Kelvin:
T = -23.0 + 273.15 = 250.15 K
Final Temperature (T₂) = 227.0°CT₂ = 227.0 + 273.15 = 500.15 K
Next, apply the combined gas law to find V₂:
(300.0 torr * 800.0 mL) / 250.15 K = (600.0 torr * V₂) / 500.15 K
Solving for V₂:
[tex]V_2 &= \left( \frac{(300.0 \, \text{torr}) \times (800.0 \, \text{mL})}{250.15 \, \text{K}} \right) \times \frac{500.15 \, \text{K}}{600.0 \, \text{torr}} \\\\V_2 &= \left( \frac{240000 \, \text{torr} \cdot \text{mL}}{250.15 \, \text{K}} \right) \times \frac{500.15 \, \text{K}}{600.0 \, \text{torr}} \\\\V_2 &= \left( \frac{240000}{250.15} \right) \times \frac{500.15}{600.0} \\\\V_2 &= 959.90 \times 0.83358 \\\\V_2 &\approx 800.05 \, \text{mL}[/tex]
Therefore, the final volume of the gas is approximately 800.05 mL.
what are two diseases that involve the thyroid gland? describe each disease
Answer: Thyroid disorders can range from a small, harmless goiter (enlarged gland) that needs no treatment to life-threatening cancer. The most common thyroid problems involve abnormal production of thyroid hormones. Too much thyroid hormone results in a condition known as hyperthyroidism.
Explanation:
Answer:
Hyperthyroidism and hypothyroidism.
Explanation:
Hyperthyroidism and hypothyroidism are thyroid diseases that affect women the most.
Hyperthyroidism (ICD 10 - E05) is a problem in which the thyroid gland produces excess hormones, which impacts on various body functions. Here the gland is overactive, that is, it works in excess. Hyperthyroidism occurs when the thyroid produces large amounts of these hormones in a short (acute) or long (chronic) period of time.
Hypothyroidism is, in short, a decrease in the production of thyroid hormones - triiodothyronine (T3) and thyroxine (T4). It is the most common disorder of this gland, which is in the neck area and resembles a butterfly. Its performance reverberates throughout the body, interfering in the heartbeat, the rhythm of the intestine, the mood and the menstrual cycle of women. The release of thyroid substances is orchestrated from the pituitary gland, a structure that is there in the brain.
HELP PLEASE I don't understand this
2a+3b—> c
If 4.0 mol of a is reacted with 4.0 mol of b which of the reactant is limiting
A) B is limiting because 4. 0 mol and 6. 0 mol are needed.
B) A is limiting because 2 is smaller than 3 (the numbers refer to the coefficients the balanced equation).
C) B is limiting because 3 is larger than 2 (the numbers refer to the coefficients in the balanced equation)
D) A is limiting because 2 moland 4. 0 mol are needed. E. Neither is limiting because equal amounts (4. 0 mol) of each reactant are reacted.
TLDR: A.
Understanding the idea of chemical equations is sometimes a hard concept to grasp in general chemistry because it’s typically not explained well. What a chemical equation represents is what literally happens on the subatomic level. The coefficients in front of the reactants and products mean, number for number, what you would get if you performed the reaction. It’s like an atomic recipe - you can only “make” things when you have enough ingredients. When an ingredient runs out, you can’t produce any products anymore. The ingredient that runs out the quickest is known as the “limiting reagent”, as it literally limits what you can produce.
In the equation above, 2 equivalents of “a” and 3 equivalents of “b” are consumed to produce the products. This means that “b” gets consumed faster than “a”. To make one sample of products, you need two molecules of “a” and three molecules of “b”. If you start out with four moles of each reactant (the same number of atoms), you’ll run out of “b” before “a” because the reaction consumes more molecules of “b” than molecules of “a”. Therefore, the answer would be A. You would need 6 moles of “b” to finish the reaction and use up the remaining “a” (a 2:3 ratio, just like in the balanced equation).
Hope this helps!
Final answer:
The limiting reactant is determined by dividing the moles of each reactant by its stoichiometric coefficient. Reactant 'B' is limiting because it gives a smaller ratio compared to 'A' after the division, indicating that it will be consumed first.
Explanation:
Identifying the Limiting Reactant
To determine the limiting reactant, you must first understand the stoichiometric relationship between reactants in a balanced chemical equation. In the given equation 2a+3b → c, the stoichiometry indicates that 2 moles of a react with 3 moles of b to produce c. We have 4.0 moles of both a and b. To find the limiting reactant, divide the number of moles of each reactant by its respective coefficient:
For a: 4.0 moles ÷ 2 = 2
For b: 4.0 moles ÷ 3 = 1.33
Reactant b will run out first because it produces a smaller ratio (1.33) compared to reactant a (2) when divided by their coefficients. Therefore, b is the limiting reactant, and the correct answer is 'A) B is limiting because 4.0 mol and 6.0 mol are needed'.
The toy car in the picture is propelled forward by A) The weight of the car. B) The force of the car on the air. C) The friction of the wheels on the car. D) The reaction force of the air on the car.
Answer:
the answer is d :)
Explanation:
Answer:
Its D
Explanation:
How many atoms are in the formula (NH4)2CO3? Please help and provide explanation!
Answer:
28
Explanation:
28 is correct. (NH4)2 is equal to 10 atoms. (8 H and 2 N ) CO3 is equal to 4 atoms. (1 C and 3 O) That's 14 atoms. But it's two molecules of this. So you just multiply by the number of molecules (2), and you get 28.
Answer:
14
Explanation:
The Ideal gas law assignment
Answer:
Check below
Explanation:
A student conducted an experiment and combined sodium chloride with magnesium hydroxide to produce sodium hydroxide and magnesium chloride. The student collected the 120 grams of NaOH. How many moles of NaOH were formed in the experiment?
Question 1 options:
4800
160
3.0
0.33
To find the number of moles of sodium hydroxide formed from 120 grams, we use the molar mass of NaOH (40 g/mol) and find that it is 3.0 moles.
Explanation:The student collected 120 grams of sodium hydroxide (NaOH). To calculate the number of moles of NaOH formed, we use the molar mass of NaOH. The molar mass of NaOH is approximately 40 g/mol (23 g/mol for sodium, 16 g/mol for oxygen, and 1 g/mol for hydrogen). Therefore, we can calculate moles using the formula:
Moles = Mass / Molar Mass
By substituting the given values into the formula, we get:
Moles = 120 g / 40 g/mol = 3.0 moles of NaOH
So, the answer to the question is that 3.0 moles of sodium hydroxide were formed in the experiment.
The correct answer is option C. 3.0 moles of NaOH were formed in the experiment.
To find out how many moles of NaOH were formed, we need to use the formula:
[tex]\[ \text{moles of NaOH} = \frac{\text{mass of NaOH}}{\text{molar mass of NaOH}} \][/tex]
The molar mass of NaOH is calculated by adding the molar masses of sodium (Na), oxygen (O), and hydrogen (H). The molar masses are approximately 22.99 g/mol for sodium, 16.00 g/mol for oxygen, and 1.01 g/mol for hydrogen. Therefore, the molar mass of NaOH is:
[tex]\[ \text{moles of NaOH} = \frac{\text{mass of NaOH}}{\text{molar mass of NaOH}} \][/tex]
Now, we can calculate the moles of NaOH produced in the experiment using the given mass of 120 grams:
[tex]\[ \text{moles of NaOH} = \frac{120 \text{ g}}{40.00 \text{ g/mol}} = 3 \text{ moles} \][/tex]
The complete question is:
A student conducted an experiment and combined sodium chloride with magnesium hydroxide to produce sodium hydroxide and magnesium chloride. The student collected 120 grams of NaOH. How many moles of NaOH were formed in the experiment?
Question 1 options:
A) 4800
B) 160
C) 3.0
D) 0.33
This chart represents four famous scientists and an aspect of their contributions
Answer:
What is the question?
Explanation:
Answer:
Gutenberg
Explanation: inventor, printer
What is the molecular geometry, or shape, of beryllium chloride (BeCl2)?
A.
tetrahedral
B.
linear
C.
trigonal pyramid
D.
bent
Answer:
linear
Explanation:
The shape of BCl₂ is linear. The central Be atom has 2 valance electron and so Be has coordination number of 2. In the Be-Cl covalent bond a pair of electron is shared by the Be and the Cl atoms. The bond angle in BeCl₂ is 180°. To account for the bond angle it has been proposed that Be has sp hybridization and each of the two sp hybrid orbital of Be overlaps with the p orbitals of Cl.
The molecular geometry, or shape, of beryllium chloride (BeCl₂) is linear. Therefore, option B is correct.
Beryllium chloride consists of one beryllium atom (Be) bonded to two chlorine atoms (Cl). The beryllium atom has two valence electrons, and it forms two sigma bonds with the chlorine atoms by sharing its electrons.
Since there are no lone pairs of electrons on the central beryllium atom, the molecule adopts a linear geometry, where the two chlorine atoms are arranged in a straight line, with the beryllium atom in the center.
Thus, beryllium chloride has linear geometry.
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Name the following chemical compound k3N
The chemical compound K₃N is called potassium nitride.
What is a compound?A compound is a substance that is composed of two or more different elements chemically bonded together.
In a compound, the elements lose their individual properties and form new chemical and physical characteristics.
Compounds are represented by chemical formulas, which indicate the types and numbers of atoms present in the compound.
Thus, the compound name of K₃N is potassium nitride. Potassium (K) is a metallic element, and nitrogen (N) is a negatively charged ion. When the three potassium atom combine with the nitrogen atom, it forms the ionic compound of potassium nitride.
Thus, the chemical compound K₃N is called potassium nitride.
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A force is a push or pull on an object that could affect its motion. Which is an example of a non-contact force?
Answer:
[tex]\boxed{\text{Electrostatic and magnetic forces}}[/tex]
Explanation:
I can think of two non-contact forces:
Electrostatic: the attractive or repulsive forces between two charged particles Magnetic: the attractive or repulsive forces between two magnetic poles.Answer:
This question is incomplete.
Explanation:
Force is classified either as contact or non-contact force.
A contact force is a force that requires physical contact/touch with the object. For example, the pushing of a car, the kicking of a ball and the pulling of a door.
Non-contact force is a force that does not require a physical touch/contact with the object. Examples of non-contact force is the force of gravity that pulls object towards itself on earth, force that repels two magnets (of like/similar pole facing each other) and the force that pulls a metallic object in a magnetic field.
Drag each label to the correct location on the table. Match each scenario to the law that explains it.
there isn't anything here to answer
Answer:
Boyle's law (PV = k)
-When the size of an air chamber is increased, the air pressure decreases.
-Pressing on an inflated balloon decreases its size.
Charles's law (V/T = k)
-A closed, flexible container expands when its heated.
-A balloon shrinks when it's taken outside in the winter.
Avogadro's law (V/n = k)
-A balloon expands when air is blown into it.
What are the two levels organization just after atoms?
Answer:
Molecule and organelles
Explanation:
An atom is the smallest and most fundamental unit of matter, it is the lowest level of organization.Atoms then form molecules. Molecules are structures that contain two or more atoms that are held together by chemical bonds.Molecules in turn form macromolecules such as DNA, by joining of smaller units called monomers. The aggregates of macromolecules then form organelles that are surrounded by membranes.What part of a gene has the nonfuncitonal code?
A:allele
B:exon
C:intron
D:polypeptide
Answer:
intron
Explanation:
For some jobs, “good enough” is good enough. That’s sometimes true in chemistry. More often, though, careful planning, calculations, measurement, and laboratory work are necessary to get the desired result. Imagine two tasks that would involve a chemical reaction of some sort. For one, measurement is not all that critical. For the other, careful stoichiometry and laboratory process is essential. Identify and describe two tasks (projects, operations, devices, etc.) that differ in this way.
Final answer:
Two tasks that illustrate the importance of precision in measurement are the casual mixing of a cleaning solution, which requires less precision, and a titration procedure in a chemistry lab, where accurate stoichiometry and quantitative chemical analysis are crucial for determining the concentration of the analyte.
Explanation:
When considering differing requirements for measurement in chemical reactions, we can compare two tasks: one where precision is not critical and another where exact stoichiometry and laboratory protocol are essential.
For a task where measurement is not critical, consider mixing a cleaning solution where the exact concentrations are not vital. Small deviations in the amount of detergent or water will not significantly affect the cleaning ability of the solution. This demonstrates a scenario where "good enough" suffices.
On the contrary, precise measurements are indispensable in a task such as a titration in a chemistry lab. In a titration, a known concentration of one solution (titrant) is added to a known volume of another solution (analyte) until the chemical reaction is complete, indicated by a color change or another marker. The volume of titrant used must be measured precisely as it's used to calculate the exact concentration of the analyte. This task necessitates careful quantitative chemical analysis, as any inaccuracy could significantly affect the validity of the results.
The number of co atoms in 2.2 mil of co
Answer:
1.325 x 10²⁴ Co atoms
Explanation:
1 mol of any substance is made of 6.022 x 10²³ units, these units could be atoms making up elements of molecules making up a compound.
Therefore 1 mol of the element cobalt is made of 6.022 x 10²³ atoms of Co
so if 1 mol of Co contains - 6.022 x 10²³ atoms of Co
then 2.2 mol of Co contains - 6.022 x 10²³ /mol x 2.2 mol
number of Co atoms in 2.2 mol of Co is - 1.325 x 10²⁴ Co atoms
explain entropy and its relationship to phase change and number of moles
Answer:
Here's what I get.
Explanation:
What is entropy?
Entropy (S) is often described as a measure of the disorder in a system, but it is really a measure or the number of microstates (W).
A microstate is a specific configuration of the locations of particles and the way that energy is distributed among them.
Entropy is a measure of the degree of the spreading of energy within a system. The more ways that energy can be distributed, the greater the entropy.
Entropy and phase changes
In the solid phase, the particles are in fixed locations and can vibrate slightly about these locations. The number of microstates is relatively small.
If you add energy and convert the solid to a liquid, the particles can slide past each other. The particles have more freedom of motion, so the energy is distributed in more ways. There are more microstates, so S(liquid) > S(solid).
If you add more energy and convert the liquid to a gas, the particles can move in all directions, and the number of microstates (and also S) increases enormously.
Entropy and number of moles
The more particles you have, the more microstates (ways to distribute the energy) there are.
However, the entropy of gaseous particles far outweighs that of those in solids or liquids.
That's why, when you are asked to predict the sign of ΔS for a reaction, all you need do is calculate the change in the number of moles (Δn) of gases.
If the products contain more moles of gases, ΔS > 0. If the products contain fewer moles of gases, ΔS < 0.
In which concentration of sulfuric acid solution would the reaction occur the fastest?
Answer:
B. 0.16 M H₂SO₄.
Explanation:
The rate of the reaction depends directly on the concentration of the reactants.Rate ∝ [Reactants].
So, the reaction occurs fastest in the highest concentration of H₂SO₄.
So, the answer is: B. 0.16 M H₂SO₄.
Helium occupies a volume of 3.8 liters at -45 degrees C. What volume will it occupy at 75 degrees C?
Answer:
5.8 L.
Explanation:
We can use the general law of ideal gas: PV = nRT.where, P is the pressure of the gas in atm.
V is the volume of the gas in L.
n is the no. of moles of the gas in mol.
R is the general gas constant,
T is the temperature of the gas in K.
If n and P are constant, and have two different values of V and T:V₁T₂ = V₂T₁
V₁ = 3.8 L, T₁ = - 45.0°C + 273 = 228.0 K.
V₂ = ??? L, T₂ = 75.0°C + 273 = 348.0 K.
∴ V₂ = V₁T₂/T₁ = (3.8 L)(348.0 K)/(228.0 K) = 5.8 L.
the summary or ending of your experiment
Answer:
Conclusion
Explanation:
I believe you were asking for the term that best matches with the description given. Typically the conclusion summarizes your experiment in a 1 to 2 paragraph format.
Final answer:
The conclusion section of a scientific paper is crucial for summarizing experimental findings, interpreting results in the context of the experiment's aims, discussing shortcomings, and recommending further research. It should address the original hypothesis and contemplate improvements for future experiments.
Explanation:
The conclusion section of a scientific paper is vital as it summarizes the importance of the experimental findings. A conclusion should clearly describe the purpose of the experiment, discuss the major findings, offer a brief explanation of these findings, and present recommendations for further study. When drafting the conclusion, it's essential to answer the original question posed by the experiment, using the results obtained. The conclusion should also highlight any shortcomings of the experiment and suggest what could be changed or extended in future research, such as collecting more data for better statistical analysis or modifying the experimental method.
The conclusion is not just a summary but serves to interpret the results in the context of the experiment's aims. If the experiment was designed to test a hypothesis, the conclusion should state whether the findings support it. Furthermore, the conclusion might also raise new questions that emerged from the study, suggest areas for further research, and identify any systematic errors or unexpected insights about the subject matter or the scientific method in general. Reflecting on what could be improved if the experiment were to be redone is also a valuable part of the concluding section.
Sort the sentences based on whether the attributes they describe belong to planets or an object that isn't a planet.
The object orbits the
The object is a satellite
Sun
The regions surrounding
the object are free from
debris
The object is triangular
in shape.
Planet
Not a Planet
2019 Edmentum All rights
Answer:
Planet: The object orbits the sun
Not planet: The object is a satellite
Planet: The regions surrounding the object are free from debris
Not Planet: The object is triangular in shape.
Explanation:
A planet is characterized as:
Spheroidal (or at least big enough to be round-ish)
It should orbit the sun (not other planets, so satellites like the moon is not considered as a planet)
It should have no debris, or cleared of debris around its orbit
Although there is now the dwarf planet category, it satisfies almost all charateristics to be considered a planet, except the cleared of debris part.
Answer:
Planet: The object orbits the sun
Not planet: The object is a satellite
Planet: The regions surrounding the object are free from debris
Not Planet: The object is triangular in shape.
From the list below, which items describe beta decay? Check all that apply. APEX
A. An atom is very stable
B. An atom has many more neutrons than electrons
C. A neutron turns into a proton
D. An electron is ejected from the nucleus
Answer:
C. A neutron turns into a proton
D. An electron is ejected from the nucleus
Explanation:
Beta decay is a type of the three major types of decays, others being alpha decay and gamma decay.During a beta decay the atomic number of an atom increases by one while the mass number remains the same.Beta decay may be classified as; an electron emission, positron emission and electron capture.During electron emission an energetic electron is emitted from the nucleus, together with an antineutrino and a neutron in the nucleus turns into a proton.In beta decay, a neutron within an atom's nucleus converts into a proton, and an electron is ejected from the nucleus. The correct descriptions of beta decay from the list are C and D.
From the list provided, the items that describe beta decay are:
C. A neutron turns into a proton
D. An electron is ejected from the nucleus
Beta decay is a radioactive process where a nucleus transforms to become more stable. During this process, a neutron converts into a proton plus an electron. This electron, also known as a beta particle, is then ejected from the nucleus at high speed. Although the neutron turns into a proton, the overall mass of the atom remains relatively constant as the mass of an electron is negligible compared to that of a neutron or a proton.
Option B is incorrect because beta decay relates to the ratio of neutrons to protons, not the comparison of neutrons to electrons. Option A is also incorrect because beta decay occurs in unstable atoms, not stable ones.
What is the empirical formula for a compound that contains 79.86 % iodine and 20.14 % oxygen by mass?
Answer:
IO₂
Explanation:
We have been given the mass percentages of the elements that makes up the compound:
Mass percentage given are:
Iodine = 79.86%
Oxygen = 20.14%
To calculate the empirical formula which is the simplest formula of the compound, we follow these steps:
> Express the mass percentages as the mass of the elements of the compound.
> Find the number of moles by dividing through by the atomic masses
> Divide by the smallest and either approximate to nearest whole number or multiply through by a factor.
> The ratio is the empirical formula of the compound.
Solution:
I O
% of elements 79.86 20.14
Mass (in g) 79.86 20.14
Moles(divide by
Atomic mass) 79.86/127 20.14/16
Moles 0.634 1.259
Dividing by
Smallest 0.634/0.634 1.259/0.634
1 2
The empirical formula is IO₂
To find the empirical formula of a compound, we calculate the moles of each element using their atomic masses. Dividing the moles by the smallest value gives us the ratio of the elements, which represents the empirical formula. For the compound containing 79.86% iodine and 20.14% oxygen, the empirical formula is IO2.
Explanation:To find the empirical formula, we need to determine the simplest whole-number ratio between the elements in the compound. To do this, we first assume we have 100g of the compound, which allows us to convert the percentages to grams. We can then calculate the moles of each element using their atomic masses. The ratio of moles gives us the empirical formula.
For the given compound that contains 79.86% iodine and 20.14% oxygen by mass:
Assuming 100g of the compound, we have 79.86g of iodine and 20.14g of oxygen. The moles of iodine can be calculated using its atomic mass (126.9 g/mol), which gives us 0.628 moles. The moles of oxygen can be calculated using its atomic mass (16.0 g/mol), which gives us 1.259 moles. Dividing both moles by the smaller value (0.628 moles) gives us the ratio of 1:2. Therefore, the empirical formula for the compound is IO2.
What is the result of adding 2.5 x 10^3 and 3.5 x 10^2
A)2.9 X 10^3
B)6.0 10^3
C)2.9 x 10^2
D)6.0 x 10^5
Answer:
A
Explanation:
Although rounding is needed, this answer makes the most sense.
If the question is (2.5 x 10^3) + (3.5 x 10^2):
= (2.5 x 1000) + (3.5 x 100)
=(2500) + (350)
= 2850.
Taking out the 10^3 with scientific notation leaves us with 2.85 x 10^3. Because this isn't an answer choice, A is the closest.
To find the sum of 2.5 x 10^3 and 3.5 x 10^2, both numbers must be expressed with the same exponent, which leads to the result of 3.75 x 10^4. None of the provided options match this result, suggesting there may be an error in the original question or answer choices.
To add 2.5 x 10^3 and 3.5 x 10^2, we need to express both numbers with the same exponent. Here's how we do it step-by-step:
Recognize that 10^3 is the same as 1000 and 10^2 is the same as 100.
Convert 3.5 x 10^2 to a number with an exponent of 3: (3.5 x 10^2) x 10 = 35 x 10^2.
Add the two numbers together: (2.5 x 10^3) + (35 x 10^2).
Since both numbers now have the same exponent, combine the coefficients: 2.5 + 35 = 37.5.
Finally, express the sum as a scientific notation: 37.5 x 10^3.
This simplifies to 3.75 x 10^4 when we adjust the coefficient to keep the number in scientific notation form. However, this result is not listed in the provided options. It seems there might be a mistake in the question or the answer choices. Please double-check the question and the options.