What is the molecule name for 2H2S?
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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 chemical compound K₃N is called potassium nitride.

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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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.

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:

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'.

Answer:

[tex]\boxed{\text{Electrostatic and magnetic forces}}[/tex]

Explanation:

I can think of two non-contact forces:

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.        

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.

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.

Answer:

Check below

Explanation:

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.

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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carries instruments aloft to send back information on atmospheric pressure, temperature, humidity and wind speed by means of a small, expendable measuring device called a radiosonde.

Weather balloons carry a radiosonde that provides essential data for weather prediction by sending back information on atmospheric conditions as it ascends to the stratosphere. This data is critical not only for daily weather reports but also for severe weather predictions. Satellites complement these observations by tracking larger atmospheric patterns.

Weather balloons play a crucial role in the systematic collection of weather data. These balloons carry a radiosonde that ascends through the atmosphere and transmits valuable information about atmospheric conditions such as temperature, pressure, humidity, and wind speed. Carried into the stratosphere, these balloons encounter different layers of the atmosphere, providing detailed, vertical profiles that are essential for meteorologists to predict the weather.

Since their conception over 70 years ago, weather balloons have proven to be an indispensable tool for meteorologists. Beyond compiling everyday weather reports, the data collected by these balloons is crucial for predicting severe weather events such as hurricanes or flooding.

The combination of data from weather balloons, satellites, and radar enables comprehensive monitoring of weather patterns. While satellites monitor large sections of the atmosphere and track various environmental elements, weather balloons provide localized, vertical data that is critical for an in-depth understanding of weather phenomena. Together, they form a synergistic network for global weather observation.

Answer:

Molecule and organelles

Explanation:

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.

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

The populations are isolated and thus do not interbreed.

Answer:B

Answer:

The populations are isolated and thus do not interbreed.

Explanation:

Answer:

5.8 L.

Explanation:

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.

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.

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.

Answer:

C. A neutron turns into a proton

D. An electron is ejected from the nucleus

Explanation:

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.

The equilibrium here is when water is boiled in a closed circuit.

The point of equilibrium can be described to be the point where there are no opposing forces. At this point, there are no changes anymore.

In the closed circuit for boiling water, no air or water would be able to leave the pot while at the same time no air or water from outside would be able to enter the pot.

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One simple and everyday example of equilibrium is homeostasis in the human body. Despite changes and fluctuations, the body maintains a balance within specific functional ranges. This dynamic balance is also evident in an ecosystem’s ability to reinstate its equilibrium in spite of disturbances, demonstrating their resistance and resilience.

An example of an equilibrium existing in everyday life, which is a state of balance between two opposing processes, can be seen within out personal biology. This is specifically illustrated in the concept of homeostasis in the human body.

Our bodies constantly adjust to internal and external changes through homeostasis ('steady state'). These changes could be in the level of glucose or calcium in our blood or changes in external pressures such as temperature. The body is persistently adjusting to the changes encountered through these process, hence it being a dynamic process.

However, it remains in equilibrium as body functions are kept within a specific range, despite some fluctuations, it's aim is to maintain a balance (set point). So, even an individual that appears inactive is internally maintaining this homeostatic equilibrium.

Another real-life example is within the ecosystem's resistance and resilience. Despite changes in species numbers and occurrences, it manages to maintain a relative constant state of biodiversity. This is its resistance, ability to remain at equilibrium in spite of disturbances. Furthermore, its resilience is shown in its ability to recover its equilibrium state after a disturbance is experienced.

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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.

Answer:

Barometer.

Explanation:

Answer:

Rogue waves could safely be classified alongside mermaids and sea monsters. ... A rogue wave is one that is at least twice the "significant wave height", which refers to the average of the third highest waves in a given period of time Rogues, called 'extreme storm waves' by scientists, are those waves which are greater than twice the size of surrounding waves, are very unpredictable, and often come unexpectedly from directions other than prevailing wind and waves.

Most reports of extreme storm waves say they look like "walls of water." They are often steep-sided with unusually deep troughs.

Since these waves are uncommon, measurements and analysis of this phenomenom is extremely rare. Exactly how and when rogue waves form is still under investigation, but there are several known causes:

Constructive interference. Extreme waves often form because swells, while traveling across the ocean, do so at different speeds and directions. As these swells pass through one another, their crests, troughs, and lengths sometimes coincide and reinforce each other. This process can form unusually large, towering waves that quickly disappear. If the swells are travelling in the same direction, these mountainous waves may last for several minutes before subsiding.

Focusing of wave energy. When waves formed by a storm develop in a water current against the normal wave direction, an interaction can take place which results in a shortening of the wave frequency. This can cause the waves to dynamically join together, forming very big 'rogue' waves. The currents where these are sometimes seen are the Gulf Stream and Agulhas current. Extreme waves developed in this fashion tend to be longer lived.

Explanation:

Mitochondrial DNA is found Inside the cell, but outside the nucleus in relation to the cell. Option B

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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Answer: C, an apple staying at rest on the ground.

Explanation: When one or more unbalanced forces are acting on an object, it causes change (eg. the apple falling on the ground would be a result of gravity being stronger than the kinetic energy that the tree is putting on the apple). Even in D, the apple is not moving, but the tree branch is still exerting force to keep the apple hanging there.

PS: I studied net forces last year. Hope this helps!

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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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.

Answer:

A-B, C-D,E-F , Temperature changes

Explanation:

Answer:Its b and D first person is wrong.

Explanation:

Answer:

- 0.0413°C ≅ - 0.041°C (nearest thousands).

Explanation:

ΔTf = Kf.m,

Where,

ΔTf is the change in the freezing point.

Kf is the freezing point depression constant (Kf = 1.86 °C/m).

m is the molality of the solution.

Molality is the no. of moles of solute per kg of the solution.

∴ molality (m) = no. of moles of solute/kg of solvent = (0.04685 mol)/(2.11 kg) = 0.0222 m.

∴ ΔTf = Kf.m = (1.86 °C/m)(0.0222 m) = 0.0413°C.

∴ The freezing point of the solution = the freezing point of water - ΔTf = 0.0°C - 0.0413°C = - 0.0413°C ≅ - 0.041°C (nearest thousands).

Answer:

B. 0.16 M H₂SO₄.

Explanation:

Rate ∝ [Reactants].

So, the reaction occurs fastest in the highest concentration of H₂SO₄.

So, the answer is: B. 0.16 M H₂SO₄.

Answer : The correct option is, [tex]Fe^{2+}(aq)+2e^-\rightarrow Fe(s)[/tex]

Explanation :

Redox reaction or Oxidation-reduction reaction is the reaction in which the oxidation and reduction reaction takes place simultaneously.

Reduction reaction : The reaction in which a substance gains electrons. In this, oxidation state of an element decreases. Or we can say that in reduction, the gain of electrons takes place.

Oxidation reaction : The reaction in which a substance looses its electrons. In this, oxidation state of an element increases. Or we can say that in oxidation, the loss of electrons takes place.

The given balanced chemical reaction is :

[tex]Mg(s)+Fe^{2+}(aq)\rightarrow Mg^{2+}(aq)+Fe(s)[/tex]

The oxidation-reduction half reaction will be :

Oxidation : [tex]Mg\rightarrow Mg^{2+}+2e^-[/tex]

Reduction : [tex]Fe^{2+}+2e^-\rightarrow Fe[/tex]

In this reaction, the oxidation state of 'Mg' changes from (0) to (+2) that means Mg lost 2 electrons and it shows oxidation and the oxidation state of 'Fe' changes from (+2) to (0) that means Fe gains 2 electrons and it shows reduction.

Therefore, the correct option is, [tex]Fe^{2+}(aq)+2e^-\rightarrow Fe(s)[/tex]

Answer:

intron

Explanation: