Answer:
The line of best fit
Explanation:
The line of best fit is the average, aka a trend
In a line graph, the line itself, connecting data points, shows trends. Scientists analyze its slope and direction to understand patterns and variations in the data.
In a line graph, the trends are primarily represented by the line itself. A line graph is a type of chart that displays data points connected by a continuous line. Each data point typically represents a pair of values, one on the horizontal axis (usually the independent variable) and one on the vertical axis (usually the dependent variable).
The line in a line graph shows how the dependent variable changes as the independent variable varies. By examining the direction, slope, and shape of the line, scientists and researchers can identify and communicate various trends in the data. Here's how:
1. Direction of the Line: The direction of the line indicates whether the dependent variable is increasing or decreasing as the independent variable changes. A rising line suggests an increase in the dependent variable, while a falling line suggests a decrease.
2. Slope of the Line: The slope of the line represents the rate of change of the dependent variable concerning the independent variable. A steeper slope indicates a more rapid change, while a shallower slope suggests a slower change.
3. Curvature of the Line: Sometimes, the line may curve, indicating a nonlinear relationship between the variables. The curvature might imply acceleration, deceleration, or other complex patterns.
In addition to the line itself, trendlines or best-fit lines can be added to a graph to provide a smoother representation of the overall trend in the data. These trendlines help researchers make predictions and identify general patterns within the data.
Overall, a line graph is a powerful tool for visualizing and conveying data trends, making it a valuable tool in scientific research, data analysis, and communication. Researchers can quickly grasp the direction and magnitude of changes in the dependent variable as it relates to variations in the independent variable.
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What is the answer please
How many molecules of PF5 are found in 39.5 grams of PF5?
Answer:
[tex]1.9 \times 10^{23} molecules[/tex] of [tex]PF_5[/tex] are found in 39.5 grams of [tex]PF_5[/tex].
Explanation:
Atomic weights : P= 31, F= 19,
molar mass of = 1 atomic weight of P+ 5 atomic weight of
F= 31+5 [tex]\times[/tex] 19
= 31+95
=126 g/mole
moles in 39.5 gm of
= [tex]\frac{Mass}{Molar mass}[/tex]
= [tex]\frac{39.5}{126}moles[/tex]
=0.3134 moles
1 mole of any substance contains
0.3131 moles contains 0.3134
[tex]= 1.9 \times 10^{23} molecules[/tex]
Therefore, [tex]1.9 \times 10^{23} molecules[/tex] of [tex]PF_5[/tex] are found in 39.5 grams of [tex]PF_5[/tex].
In 39.5 grams of PF5, there are approximately 1.86 x 10^23 molecules. This is calculated by first finding the number of moles of PF5 in 39.5 grams, and then multiplying this by Avogadro's number.
Explanation:To calculate the number of molecules in a specified mass of a compound, you have to first calculate the molar mass of the compound. In this case, the molar mass of PF5 (Phosphorus pentafluoride) is approximately 127.96 g/mol. So in 39.5 grams of PF5, there are 39.5g / 127.96 g/mol = 0.309 moles of PF5.
Avogadro's number, which is 6.022 x 10^23, tells us the number of particles (atoms, molecules, ions etc) in one mole of a substance. Therefore, to find the number of molecules in 0.309 moles of PF5, we multiply 0.309 moles by Avogadro's number.
This gives us a final answer of approximately 1.86 x 10^23 molecules of PF5 in 39.5g of PF5.
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How many electrons can fit in each subshell?
Answer: each subshell can hold 2 electrons.
What is the atmospheres in order from earth
Answer:
Earth's atmosphere is divided into five main layers: the exosphere, the thermosphere, the mesosphere, the stratosphere and the troposphere.
Explanation:
The Earth's atmosphere consists of five main layers: troposphere, stratosphere, mesosphere, thermosphere, and exosphere. Each layer has different characteristics and functions.
Explanation:The Earth's atmosphere is divided into five main layers: the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. These layers differ in temperature, composition, and altitude. The troposphere is the layer closest to the Earth's surface, followed by the stratosphere, mesosphere, thermosphere, and finally the exosphere. Each layer plays a crucial role in regulating the Earth's climate and protecting us from harmful solar radiation.
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In your own words, explain how/why precipitates form. Also explain what spectator ions are.
A precipitate is a product of a reaction that is insoluble in the reaction medium (usually water).
Why?
One of the signs that a reaction happened is that a precipitate forms. Let's take the reaction between Silver Nitrate (AgNO₃) and Sodium Chloride (NaCl) as an example:
AgNO₃(aq) + NaCl(aq) → AgCl(s)↓ + NaNO₃(aq)
In this reaction, Silver Chloride (AgCl) is an insoluble product of the reaction, and precipitates out of the reaction medium
If we write down the ionic equation, we find out the following:
Ag⁺ + NO₃⁻ + Na⁺ + Cl⁻ → AgCl(s) + Na⁺ + NO₃⁻
The ions that appear at both sides of the arrow are called spectator ions, since they are not directly involved in the process of the reaction, making the net ionic equation to be:
Ag⁺ + NO₃⁻ → AgCl(s)
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as the difference in electronegativity between two atoms decreases, the tendency for the formation of covalent bonds
Answer:
As the difference in electronegativity between two atoms decreases, the tendency for the formation of covalent bonds "increases"
Explanation:
Electronegativity being a chemical property which tells us about the tendency about the atom in order to fascinate the shared pair of the electron towards itself. It is being pretentious by atomic number and the distance as well, by the help of which the valence electrons resides from the charged nucleus. In the scale Pauling scale is used. Being the most electronegative element fluorine is counted. The more the electronegativity, the more electrons will fascinate towards itself.
Gravity is dependent on which of the two factors?
mass and weight
distance and weight
mass and force
mass and distance
Answer:
mass and weight
Explanation:
because ur weight pulls you to the center of the earth
If a weather map has a symbol that shows a circle with an H in the middle, what is it
referring to?
A.) high pressure
B.) high weather
C.) high temperature
D.) humid weather
Answer:
high pressure
Explanation:
What is the length in inches of a 100-meter field?
Answer: 3937 inches
Explanation: The conversion factor of 1m = 39.37 inches
Solution:
100 m x 39.37 in / 1 m
= 3937 inches
Cancel out meters so the remaining unit is in inches
Which of the following best defines one mole of a substance?
A. Mass, in grams, of each particle of the substance.
B. Mass, in grams, of the nuclear us of the substance’s atoms.
C. Amount of substance present in one atom of the substance
D. Amount of substance present in Avogadro‘s number of particles of the substance
Answer: D
Explanation:
A mole corresponds to the mass of a substance that contains 6.023 x 1023 particles of the substance. The mole is the SI unit for the amount of a substance. Its symbol is mol. By definition: 1 mol of carbon-12 has a mass of 12 grams and contains 6.022140857 x 1023 of carbon atoms (to 10 significant figures)
Moles are the base unit or the smallest chemical entities that are present in the molecule, atom, or compound.
The one mole of a substance is equal to the amount of substance present in the Avogadro's number of particles of the substance.
Moles can be defined as:
Moles are the exactly [tex]6.02214\times 10^{23}[/tex] elementary entities present in the atoms, molecules, ions, or an electron. The value of given by the scientist Amedeo Avogadro, who is noted for the discovery of Avogadro's law and Avogadro's constant.
Thus, the correct answer is Option D.
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Which element has the smallest radius? a. fluorine b. iodine c. chlorine d. bromine
Answer: chlorine
Explanation:
its the most up and right on the periodic table
Fluorine (F) has the smallest atomic radius among the options given, as its higher effective nuclear charge and position in the periodic table leads to a stronger attraction of electrons to the nucleus.
Explanation:To determine which element has the smallest atomic radius among fluorine (F), iodine (I), chlorine (Cl), and bromine (Br), we should look at their positions on the periodic table. Atomic radii decrease across a period from left to right due to the increase in the number of protons in the nucleus, which attracts the electron cloud more strongly. Also, atomic radii increase as we move down a group because additional electron shells are added which are farther from the nucleus.
Given this information, among the elements listed, fluorine (F) has the smallest atomic radius because it is higher up and farther to the right on the periodic table as compared to the other halogens (Cl, Br, and I). This placement indicates that fluorine has a greater effective nuclear charge (denoted as 'valence Z*'), which results in a stronger attraction of valence electrons to the nucleus, leading to the smaller atomic radius mentioned in Answer 6.
As an example, which is provided in the reference information under 'Check Your Learning,' an atom smaller than fluorine (F) could be helium (He), which has fewer electron shells and is also to the right of fluorine in the periodic table, within the noble gases.
9. lonization energy is the amount of energy necessary to
Answer: Remove a loosely bound valence electron from a gaseous atom on its orbital shell.
Explanation: It is the minimum energy required to pull out outer electrons on its energy orbital.
The p subshell can hold up to eight electrons in an atom (2 points)
True or false?
Answer: The statement is false
Explanation:
Electrons occupy a region in atoms known as orbitals or subs hell. These orbitals include
I) S-orbital: it can occupy a maximum of two electrons
II) P-orbital: It occupies a maximum of six electrons
III) D-orbital: it occupies a maximum of ten electrons
F and G-orbitals as examples of other orbitals present.
A good illustration of the 6 electrons occupied by the P-subshell is seen in Sodium (Na) with atomic number of 11
Na = 1s2, 2S2 2p6, 3s1
Note: extra electrons are transferred to the next orbital
give the name of the following organic compound CH3 _O _CH3
Answer:
Dimethyl ether
Explanation:
There r 2 in this. In the straight chain carbon there are 2 of there so we name it as di. It is methyl so we gave it methyl.
Answer:
Dimethyl ether (methoxymethane)
Explanation:
Visible light, which has a wavelength of between 380 nm and 760 nm, is usually
A.
changed to a different wavelength by the atmosphere.
B.
not fully absorbed by the atmosphere.
C.
completely destroyed by the atmosphere.
D.
fully absorbed by the atmosphere.
Answer:
not fully absorbed by the atmosphere.
Explanation:
Visible light with a wavelength of 380-760 nm will usually not be fully absorbed by the atmosphere. Visible light is most likely to reach Earth's surface or be partially absorbed and scattered by the atmosphere. Other types of radiation, such as infrared radiation and ultraviolet light, are more readily absorbed by the atmosphere.
Answer:
not fully absorbed by the atmosphere.
Explanation:
Visible light with a wavelength of 380-760 nm will usually not be fully absorbed by the atmosphere. Visible light is most likely to reach Earth's surface or be partially absorbed and scattered by the atmosphere. Other types of radiation, such as infrared radiation and ultraviolet light, are more readily absorbed by the atmosphere.
Convert 4.2 moles of C2H6 gas to volume at STP
balance the equation Fe(OH)3 -> Fe2O3 + H2O
Answer:
2 Fe(OH)3 => Fe2O3 + 3 H2O
Explanation: The coefficients are the following: 2,1,3
To balance each atom we write coefficients.
Reactant Product
Fe 2 2
O 6 6
H 6 6
Final answer:
To balance the equation Fe(OH)3 -> Fe2O3 + H2O, place a coefficient of 2 before Fe(OH)3 and a coefficient of 3 before H2O resulting in 2 Fe(OH)3 -> Fe2O3 + 3 H2O, ensuring both sides have equal numbers of each atom.
Explanation:
To balance the chemical equation for the decomposition of iron(III) hydroxide into iron(III) oxide and water, we need to ensure that the number of atoms of each element is the same on both sides of the equation. Start with the original unbalanced equation: Fe(OH)3 → Fe2O3 + H2O.
Count the number of Fe, O, and H atoms on each side of the equation.
Balance the Fe atoms by placing a coefficient of 2 before Fe(OH)3 on the left side: 2 Fe(OH)3 → Fe2O3 + H2O.
Balance the oxygen atoms by placing a coefficient of 3 before H2O on the right side: 2 Fe(OH)3 → Fe2O3 + 3 H2O.
Balance the hydrogen atoms now, which should already be balanced if you've followed steps 1-3 correctly.
Check the balancing for both atoms and charge. Confirm that there are equal numbers of Fe, O, and H atoms on both sides.
The final balanced equation is: 2 Fe(OH)3 → Fe2O3 + 3 H2O. All atoms are balanced and coefficients are in the simplest whole-number ratio, meaning the equation is now properly balanced.
2. What is the frequency of a 6.9 x 10-13 m wave?
.
co
The frequency of the wave at the given wavelength is [tex]4.35 \times 10^{20} \ Hz[/tex].
The given parameters;
wavelength of the wave, λ = 6.9 x 10⁻¹³ mThe frequency of the wave is calculated by applying wave equation as shown below;
v = fλ
where;
f is the frequency of the wavev is the speed of lightThe frequency of the wave is calculated as follows;
[tex]f = \frac{v}{\lambda} \\\\f = \frac{3\times 10^8}{6.9 \times 10^{-13}} \\\\f = 4.35 \times 10^{20} \ Hz[/tex]
Thus, the frequency of the wave at the given wavelength is [tex]4.35 \times 10^{20} \ Hz[/tex]
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To find the frequency of a wave, you divide the speed of light by the wavelength. Using these facts, the frequency of a 6.9 x 10-13 m wave is approximately 4.3 x 1020 Hz.
Explanation:The frequency of a wave can be calculated with the following equation: frequency (f) = speed of light (c)/wavelength (λ). The wavelength is provided (6.9 x 10-13 m), and we know the speed of light is approximately 3.00 x 108 m/s. Using these values, the frequency calculations would look like:
f = c/λ
= 3.00 x 108 m/s / 6.9 x 10-13 m
≈ 4.3 x 1020 Hz
So, the frequency of a 6.9 x 10-13 m wave is approximately 4.3 x 1020 Hz.
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What is the ratio of ai3+ions to s2- ions in the neutral compound
Final answer:
The ratio of Al³⁺ ions to S²⁻ ions in the neutral compound is 2:3, as two Al³⁺ ions balance the charge of three S²⁻ ions to achieve neutrality.
Explanation:
The question is asking about the ratio of ions in a neutral compound, specifically between [tex]AI^{3+}[/tex] ions and [tex]S^{2-}[/tex] ions. The given information suggests that we have a compound with a formula indicating these ions are in a 2:3 ratio. To achieve neutrality, the total positive charge must balance with the total negative charge. Aluminum ions have a charge of +3 ( [tex]AI^{3+}[/tex] ), and sulfur ions have a charge of -2 (S²⁻). Therefore, we need two aluminum ions to balance three sulfur ions, resulting in the formula [tex]AI_{2} S_{3}[/tex]. Even though the provided information hints at a more complex compound with oxygen involved ([tex]AI_{2} S_{3} O_{12}[/tex]), the basic ratio between aluminum and sulfur ions remains 2:3 in the simpler formula [tex]AI_{2} S_{3}[/tex].
Determine the empirical formula of an organic hydrocarbon compound that contains 80% by mass of carbon and 20% by mass of hydrogen. If the Mr of the compound is 30, what is the molecular formula?
Answer: ethane
Explanation:
To determine the empirical formula of a hydrocarbon with 80% carbon and 20% hydrogen, calculate the moles of each and establish the simplest whole number ratio, which is CH₃. The molecular formula is then derived by dividing the molar mass of the compound by the empirical formula mass; since Mr is 30, the molecular formula is C₂H₆.
Determining Empirical and Molecular Formulas
To determine the empirical formula of an organic hydrocarbon compound with 80% carbon and 20% hydrogen by mass, assume a 100 g sample of the compound. This assumption simplifies the calculation because the percentages can be directly treated as grams:
80 g carbon (C)
20 g hydrogen (H)
Next, convert these masses into moles based on the atomic masses of carbon and hydrogen (approximately 12.01 g/mol for C and 1.01 g/mol for H):
Carbon: 80 g C ÷ 12.01 g/mol C = approximately 6.66 mol C
Hydrogen: 20 g H ÷ 1.01 g/mol H = approximately 19.80 mol H
Divide the moles of each element by the smallest number of moles to get a ratio:
Ratio of C:H = 6.66 mol C : 19.80 mol H = 1:3
So, the empirical formula is CH₃.
Next, to find the molecular formula, we need to use the given molar mass (Mr) of the compound, which is 30 g/mol. Since the empirical formula mass of CH₃ is about 15.03 g/mol (12.01 for C + 3 × 1.01 for H), we divide the molar mass of the compound by the empirical formula mass:
30 g/mol ÷ 15.03 g/mol
This gives us a ratio of approximately 2, suggesting that the molecular formula is twice that of the empirical formula. Therefore, the molecular formula is C₂H₆.
This is very difficult
Answer: C
Explanation:
mercury has a density of 13.6g/mol what volume of mercury must be taken to obtain 225g of the metal
To obtain 225g of mercury, approximately 16.54 mol of the metal must be taken.
Explanation:To find the volume of mercury needed to obtain 225g of the metal, we can use the formula:
Density = Mass / Volume
Rearranging the formula to solve for Volume, we get:
Volume = Mass / Density
Plugging in the values given, we have:
Volume = 225g / 13.6g/mol = 16.54 mol
To obtain 225g of mercury, we would need a volume of approximately 16.54 mol.
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How many grams of potassium chloride are produced if 25.0 grams of
potassium chlorate decompose?
Answer:
Approximately "15.2" grams of potassium chloride are produced if 25.0 grams of potassium chlorate decompose
Explanation:
The key to chemistry is to change everything to moles. Then when you have the answer in moles change the answer back to grams, liters, or whatever you want.
change 25 grams of potassium chlorate to moles.
calculate the gram molecular mass of potassium chlorate.
Chlorate is Cl with 3 oxygens. ate = saturated.
Chlorine has seven valance electrons when it is saturated six of these electrons are used by oxygen ( 2 electrons per oxygen) leaving only 1 electron.
1 K x 39 [tex]\frac{grams}{mole}[/tex] = 39
[tex]Cl^{+1}[/tex] x 35.4 [tex]\frac{grams}{mole}[/tex] =35.4
[tex]O^{+3}[/tex] x 16 [tex]\frac{grams}{mole}[/tex] = 16
= 122.4 [tex]\frac{grams}{mole}[/tex] Potassium Chlorate
= [tex]\frac{25}{122.4}moles[/tex]
2.05 moles of Potassium Chlorate.
There is a 1:1 mole ratio. 1 mole of Potassium Chlorate will produce 1 mole of Potassium Chloride.
2.05 moles of Potassium Chlorate will produce 2.05 moles of Potassium Chloride.
the gram molecular mass of Potassium Chloride.
1 K x 39 = 39
[tex]Cl^{+1}[/tex]x 35.4 = 35.4
= 74.4 [tex]\frac{grams}{mole}[/tex]
2.05 moles x 74.4 [tex]\frac{grams}{mole}[/tex]= 15.2 grams
Therefore, "15.2" grams of potassium chloride are produced if 25.0 grams of potassium chlorate decompose.
Answer:15 g KCl
Explanation: 2KCl3->2KCl+3O2
Which of the following reactions is endothermic?
H2(g) + ½O2(g) → H2O(g), ΔH = -57.82 kcal
½N2(g) + O2(g) + 8.1 kcal → NO2(g)
½N2(g) + 3/2H2(g) → NH3(g) + 11.0 kcal
C(diamond) + O2(g) → CO2, ΔH = -94.50 kcal
Explanation:
Chemical reaction
When two or more substances react and form some new substance it is called as chemical reaction .
A + B --> C + D
(reactants ) (products )
When ever chemical reaction occurs following changes can occur :
Change in colour Ppt formation energy changes Change in stateEvolution of gas etcOn the basis of energy changes : reactions are of two types :
Endothermic
Exothermic
Endothermic reaction
A reaction in which heat is absorbed .
Example :½N2(g) + O2(g) + 8.1 kcal → NO2(g)
Exothermic reaction
A reaction in which heat is released .
For example : H2(g) + ½O2(g) → H2O(g), ΔH = -57.82 kcal
½N2(g) + 3/2H2(g) → NH3(g) + 11.0 kcal
C(diamond) + O2(g) → CO2, ΔH = -94.50 kcal
Final answer:
The reactions ½N2(g) + O2(g) + 8.1 kcal → NO2(g) and ½N2(g) + 3/2H2(g) → NH3(g) + 11.0 kcal are endothermic because they absorb heat, as indicated by their positive ΔH values.
Explanation:
To determine whether a chemical reaction is exothermic or endothermic, we need to look at the heat term (ΔH) associated with the reaction. An exothermic reaction releases heat and therefore has a negative ΔH value. An endothermic reaction absorbs heat and has a positive ΔH value.
In the examples provided:
H2(g) + ½O2(g) → H2O(g), ΔH = -57.82 kcal is exothermic because heat is released (negative ΔH).½N2(g) + O2(g) + 8.1 kcal → NO2(g) is endothermic because heat is absorbed (positive ΔH).½N2(g) + 3/2H2(g) → NH3(g) + 11.0 kcal is endothermic because it absorbs heat (positive ΔH).C(diamond) + O2(g) → CO2, ΔH = -94.50 kcal is exothermic due to the release of heat (negative ΔH).Therefore, the reactions ½N2(g) + O2(g) + 8.1 kcal → NO2(g) and ½N2(g) + 3/2H2(g) → NH3(g) + 11.0 kcal are both endothermic reactions.
which law represents a balanced chemical equation?
Answer:
All chemical equations goes to the law of conservation of mass which says that matter can not be destroyed nor created which means there has to be an equal amount of atoms of each element on both sides of the equation. I hope that helps, I'm learning this as well.
Answer:
The law of conservation of mass, this is what I got correct on a test hopefully this helps Im sorry I don’t have any written proof. Please tell me if this is incorrect:)
Explanation:
2 FeCl2 + Cl2 → 2 FeCl3
If 1.1898 moles of FeCl2 are reacted, how many moles of Cl2 will also be reacted?
Answer:
0.5949 mol Cl2
Explanation:
1. Balance equation - that was given
2. Identify the "given" and what is being asked
-Given moles of FeCl2, Find moles of Cl2
List other known quantites - 1 mol Cl2 = 2 mol FeCl2 (given based on the equation)
3. Prepare a concept map = mol FeCl2 -> mol O2
(Equation should be set up like: 1mol Cl2/2 mol FeCl2)
4. Cancel units and calculate:
----> 1.1898 mol FeCl2 x 1 mol Cl2/2 mol FeCl2 = 0.5949 mol Cl2 will be reacted
which of thur following careers requires chemistry knowledge?
a. doctor
b. pharmacist
c. forensics expert
d. all of the above
Answer:
All of them.
Explanation:
They all require some sort of chemistry knowledge as they might be dealing with substances.
Doctors, pharmacists, and forensics experts all require chemistry knowledge in their respective fields to understand interactions and chemical compositions pertaining to medicines, drugs, and evidence.
Explanation:The correct answer to the question 'Which of the following careers requires chemistry knowledge?' is d. all of the above. Each of these professions requires some knowledge of chemistry:
Doctors need to understand how different medicines interact with the body's chemistry. As for pharmacists, their whole job revolves around the chemical compositions of drugs and how they can benefit or harm patients. Lastly, forensics experts often use chemistry to analyze evidence collected from crime scenes. Learn more about Chemistry in Careers here:
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Which solution has the greater concentration?
A. 0.500 mole LiCl dissolved in 250 ml solution
B. 0.250 mole LiCl dissolved in 250 ml of solution
C. Both the same
The higher concentrated solution is 0.250 mole LiCl dissolved in 250 ml of solution
( B).0.250mole of LiCl diluted in 250ml solution
Explanation:
Procedure to find the intensity of the solution:
To find the intensity of the solution, we have to use the following formula
M1V1=M2V2
250mL of a 0.500 M aqueous solution of LiCl is diluted with water
[tex]M1V1=(250) \times (0.500)=125M[/tex]
250 ml of a 0.250M aqueous solution of LiCl is diluted with water
[tex]M2V2=(250) \times (0.250)=62.5M[/tex]
Thus the PH level of a solution increases from ascending order, Therefore the Solution with 62.5M is a higher concentration than that of the solution with 125M.
What's the most abundant elements
Answer:
Hydrogen and Oxygen.
Explanation:
The most abundant element in the universe is the Hydrogen which 75% of the universe and remaining 25% is covered by the Helium. The Oxygen is the third most abundant element of the Universe as its mainly found only on the planet earth and the scientists are still finding oxygen in the outer earth.
On the Earth, the most abundant element in the crust is Oxygen which covers 46.6% of the total elements in the crust and the element abundant after oxygen in the earth crust is the Silicon with 27.7%
For Human body, the most abundant element is the Oxygen which Includes 65% of the total body weight.
So, the Hydrogen and Oxygen are the two most abundant element of the Universe also vital elements of the human body.
A gas occupies a volume of 410 mL at 27°C and 740 mm Hg pressure. Calculate the volume the gas
would occupy at 250.°C and 680 mm Hg pressure.
The problem requires using the combined gas law, which involves an equation relating pressures, volumes, and temperatures of a gas sample. By converting temperatures to Kelvin and using given pressure and volume values, we can solve for the final volume.
Explanation:The question involves using the combined gas law to calculate the new volume of a gas given changes in temperature and pressure. To find the volume the gas would occupy at 250°C and 680 mm Hg pressure, we use the formula:
V2 = (P1 × V1 × T2) / (P2 × T1)
First, we need to convert the temperatures from Celsius to Kelvin:
Initial temperature: T1 = 27°C + 273.15 = 300.15 KFinal temperature: T2 = 250°C + 273.15 = 523.15 KNow we plug the values into the combined gas law equation:
V2 = (740 mm Hg × 410 mL × 523.15 K) / (680 mm Hg × 300.15 K)
After doing the math, you can find the final volume, V2, in milliliters (mL).