Answers
Answer:
Explanation:
1 mol of sodium = 23 grams (use the number on your periodic table).
0.7350 mol sodium = x
Cross multiply
1*x = 0.7350 * 23
x = 16.905
You will get slightly less than this, depending on your periodic table. But the method will be the same.
Related Questions
What is 188.5°F in Celsius?
Answers
Answer:
That would be 86.944 Celsius
Explanation:
(188.5°F − 32) × 5/9 = 86.944°C
Answer: \(86.944444\)°C
Explanation: (188.5°F − 32) × 5/9 = 86.944°C
I need help with number 4 please look at 1,2and 3 so you can do 4
Answers
ANSWER
The mass of the first product (calcium) in grams is 100.195 grams
EXPLANATION
Given that
The mass of calcium nitrate is 410.0 grams
Step 1; Write the balanced equation of the reaction
\(\text{ Ca\lparen NO}_3)_2\text{ }+\text{ 2Li }\rightarrow\text{ Ca}_{(s)\text{ }}\text{ }+\text{ 2LiNO}_3\)In the above reaction, 1 mole of calcium nitrate reacts with 2 moles of Li to produce 1 mole of Ca and 2 moles of LiNO3
Step 2; Find the mole of calcium nitrate using the below formula
\(\text{ mole }=\text{ }\frac{\text{ mass}}{\text{ molar mass}}\)Recall, that the molar mass of Ca(NO3)2 is 164.1 g/mol
\(\begin{gathered} \text{ mole }=\text{ }\frac{410}{164.1} \\ \text{ mole }=\text{ 2.50 moles} \end{gathered}\)The moles of Calcium nitrate is 2.50 moles
Step 3; Find the mole of calcium using stoichiometry ratio
Since calcium is the first product of the reaction, hence, the number of moles of calcium can be calculated below
1 mole of Ca(NO3)2 produced 1 mole of ca
Let the number of moles of calcium be x
\(\begin{gathered} \text{ 1 mole Ca\lparen NO}_3)_2\text{ }\rightarrow\text{ 1 mole Ca} \\ \text{ 2.5 moles Ca\lparen NO}_3)_2\text{ }\rightarrow\text{ x mole Ca} \\ \text{ cross multiply} \\ \text{ x mole Ca }\times\text{ 1 mole Ca\lparen NO}_3)_2\text{ }=\text{ 1 mole Ca}\times\text{ 2.5 moles Ca\lparen NO}_3)_2 \\ \text{ Isolate x mole Ca} \\ \text{ x mole Ca }=\text{ }\frac{1\text{ mole Ca}\times2.5\cancel{moles\text{ Ca\lparen NO}_3})_2}{1\cancel{mole\text{ Ca\lparen NO}_3})_2} \\ \text{ x mole Ca }=\text{ }\frac{1\text{ }\times\text{ 2.5 }}{1} \\ \text{ x }=\text{ 2.5 moles} \end{gathered}\)Therefore, the number of moles of calcium is 2.5 moles
Step 4; Find the mass of Ca using the below formula
\(\text{ mole }=\text{ }\frac{\text{ mass}}{\text{ molar mass}}\)recall, that the molar mass of calcium is 40.078 g/mol
\(\begin{gathered} \text{ 2.5 }=\text{ }\frac{\text{ mass}}{\text{ 40.087}} \\ \text{ cross multiply} \\ \text{ mass }=\text{ 2.5 }\times\text{ 40.078} \\ \text{ mass }=\text{ 100.195 grams} \end{gathered}\)Therefore, the mass of the first product (calcium) in grams is 100.195 grams
Reduction of methanal equation
Answers
Answer:
hi
Explanation:
than you for points and thank me if you like
Which simple machine is best used to split apart an object
A. A screw
B. A lever
C. A wedge
D. A pulley
Answers
Answer:
its A screw :))) your welcome
If oxygen gas at 118 °C and 10.8 atm was heated to 948 °C, what would the new
pressure be?
Answers
Answer: The new pressure is 1.34 atm.
Explanation:
Given: \(P_{1}\) = 10.8 atm, \(T_{1} = 118^{o}C\)
\(P_{2}\) = ?, \(T_{2} = 948^{o}C\)
Formula used to calculate the new pressure is as follows.
\(\frac{P_{1}}{T_{1}} = \frac{P_{2}}{T_{2}}\\\frac{10.8 atm}{118^{o}C} = \frac{P_{2}}{948^{o}C}\\P_{2} = 1.34 atm\)
Thu, we can conclude that the new pressure is 1.34 atm.
What is the freezing point (in degrees Celcius) of 3.75 kg of water if it contains 189.9 g of C a B r 2?
Answers
Answer:
The freezing point of the solution is -1.4°C
Explanation:
Freezing point decreases by the addition of a solute to the original solvent, freezing point depression formula is:
ΔT = kf×m×i
Where Kf is freezing point depression constant of the solvent (1.86°C/m), m is molality of the solution (Moles CaBr₂ -solute- / kg water -solvent) and i is Van't Hoff factor.
Molality of the solution is:
-moles CaBr₂ (Molar mass:
189.9g ₓ (1mol / 199.89g) = 0.95 moles
Molality is:
0.95 moles CaBr₂ / 3.75kg water = 0.253m
Van't hoff factor represents how many moles of solute are produced after the dissolution of 1 mole of solid solute, for CaBr₂:
CaBr₂(s) → Ca²⁺ + 2Br⁻
3 moles of ions are formed from 1 mole of solid solute, Van't Hoff factor is 3.
Replacing:
ΔT = kf×m×i
ΔT = 1.86°C/m×0.253m×3
ΔT = 1.4°C
The freezing point of water decreases in 1.4°C. As freezing point of water is 0°C,
The freezing point of the solution is -1.4°C
Answer:
THE FREEZING POINT IS -1.41 °C
Explanation:
Using the formula of change in freezing point:
ΔTf = i Kf m
i = 3 (1 Ca, 2 Br)
i is the number of the individual elements in the molecules
Kf of water = 1.86 °C/m
mass of CaBr2 = 189.9 g
Calculate the Molar mass of CaBr2:
Molar mass = ( 40 + 80*2) = 200 g/mol
Calculatee the molarity:
molarity = 189.9 g * 1 mole / 200 g/mol / 3.75 kg of water
molarity = 0.2532 M
So therefore, the change in freezing point is:
ΔTf = 1 Kf * M
ΔTf = 3 * 1.86 * 0.2532
ΔTf = 1.41 °C
The freezing point = old freezing point - change in freezing point
The freezing point = 0 - 1.41 °C = - 1.41 °C
The freezing point therefore is -1.41 °C
if an ocean wave has a frequency of 2 hz and a speed of 4 m/s , what is the wavelength
Answers
Answer:2m
Explanation:
4/2=2
The wavelength will be "2 m".
Given values are:
Frequency,
f = 2 hzSpeed,
v = 4 m/sAs we know,
→ \(Frequency(f) = \frac{Speed (v)}{Wavelength (\lambda)}\)
or,
→ \(\lambda = \frac{v}{f}\)
By substituting the values, we get
→ \(=\frac{4}{2}\)
→ \(= 2 \ m\)
Thus the above response is correct.
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Hydrogen reacts with oxygen according to the balanced equation
2H₂ (g) + O2(g) → 2H₂O(g). If X is the number of molecules of H₂ which react,
then the number of O2 molecules reacting is
Answers
Answer:
x/2
Explanation:
X = 2 molecules of H2
For 2 molecules of H2, there's only 1 molecule of O2. Meaning, there's twice the amount of H2, so O2 = x/2 molecules.
I hope I'm understanding this question right.
The summit of mount Everest is at 29,029 feet. At this elevation the atmosphere pressure is 30 kPa or about 0.30 atm. What is the boiling point of water at the top of mount Everest
Answers
The boiling point of water is 341.74K
Data Given;
height = 29,029 ftpressure(p) = 30kpa = 0.30atmT1 = 100^oC or 373KH(vap) = 43653 kJ/molThe formula to solve this problem is
\(ln(\frac{1}{p}) = \delta H/R (\frac{1}{T_1} - \frac{1}{T2}) \)
We can solve for the final temperature here;
\(In(1/0.3) = 40653/8.314(\frac{1}{373}-\frac{1}{T_2}) \)
\(ln(3.33) = \frac{4809.47}{T_2} - 13.108\\ T_2 = 341.72K = 69^0C\)
solving for the boiling point of water (T2) at the top,
T2 = 341.72K = 69°C
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The transfer of thermal energy from a warmer object to a cooler object is called
A heat
B temperature
C kinetic energy
D radiation
Answers
Answer:
c
Explanation:
somehow i didnt have to look this up to help u lol i learned this is 6th grade
Enter your answer in the provided box. An element has two naturally-occurring isotopes. The mass numbers of these isotopes are 121.00 u and 123.00 u, with natural abundances of 90% and 10%, respectively. Calculate its average atomic mass. Report your answer to 2 decimal places.
Answers
Answer:
Kk I got it now but I think it to be great
Substances A and B react with each other such that A is 75% consumed in 16 minutes and A is 87.5% consumed in 24 minutes. Changing the concentration of B has no effect on the reaction rate. The reaction is:
a. Zero order in both A and B.
b. First order in both A and B.
c. Second order in A and zero order in B.
d. First order in A and zero order in B.
e. There is insufficient information to answer this question.
Answers
Option d. First order in A and zero order in B. The reaction rate can be determined by the rate of change of concentration of the reactant over time.
In this case, the reaction is first order in A, meaning the reaction rate is proportional to the concentration of A. This can be seen as the reaction rate is the same even when the concentration of B is changed, implying that B has no effect on the reaction rate. On the other hand, the reaction is zero order in B, meaning the reaction rate is independent of the concentration of B. This means that the reaction rate is proportional to the concentration of A and is independent of the concentration of B. This can be observed from the fact that the reaction rate remains the same when the concentration of B is changed, implying that B has no effect on the reaction rate. On the other hand, the reaction rate is directly proportional to the concentration of A, meaning that as the concentration of A increases, the reaction rate also increases. Therefore, the reaction is first order in A and zero order in B.
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Pls answer how many neutrons, protons, and electrons there are. I will give points, thanks, 5 stars, and brainliest if you answer correctly. Thank you and have a nice day :)
Answers
Answer:
19 electron 19 proton 20 neutrons
which of the following is not a form of kinetic energy? a. chemival energy, b. electrical energy, c. light energy, d. mechanical energy
Answers
Answer:
d
Explanation:
i looked it up
Mechanical energy is not a form of kinetic energy. Hence, option D is correct.
What is kinetic energy?Kinetic energy is a form of energy that an object or a particle has by reason of its motion.
Mechanical energy is the sum of the kinetic energy, or energy of motion, and the potential energy, or energy stored in a system by reason of the position of its parts.
Hence, option D is correct.
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Determine the molar mass of a 0.643-g sample of gas occupies 125 mL at 60. cm of Hg and 25°C
Answers
Explanation:
To determine the molar mass of the gas, we need to use the ideal gas law equation:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature. We can rearrange this equation to solve for the number of moles:
n = (PV) / (RT)
We are given the mass of the gas (0.643 g), the volume (125 mL), the pressure (60. cm Hg), and the temperature (25°C). To use these values in the ideal gas law equation, we need to convert the volume to liters and the pressure to atmospheres (atm) and the temperature to Kelvin (K):
V = 125 mL = 0.125 L
P = 60. cm Hg = 0.789 atm (using the conversion factor 1 atm = 760 mm Hg and 1 cm Hg = 1.33322 mm Hg)
T = 25°C + 273.15 = 298.15 K
Substituting these values into the ideal gas law equation and solving for n gives:
n = (PV) / (RT) = (0.789 atm x 0.125 L) / (0.0821 L·atm/mol·K x 298.15 K) = 0.00314 mol
To find the molar mass, we can use the formula:
molar mass = mass of sample / number of moles
molar mass = 0.643 g / 0.00314 mol = 204.46 g/mol
Therefore, the molar mass of the gas is approximately 204.46 g/mol.
Answer:
To determine the molar mass of the gas, we need to use the ideal gas law, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature. We can rearrange this equation to solve for n:
n = PV/RT
First, we need to convert the pressure to atmospheres (atm) and the volume to liters (L):
cm Hg = 0.788 atm (using the conversion factor 1 atm = 760 mm Hg)
125 mL = 0.125 L
Next, we can substitute the given values into the equation and solve for n:
n = (0.788 atm)(0.125 L)/(0.0821 L·atm/mol·K)(298 K) = 0.00472 mol
Finally, we can calculate the molar mass by dividing the mass of the sample by the number of moles:
molar mass = 0.643 g/0.00472 mol = 136 g/mol (rounded to three significant figures)
Therefore, the molar mass of the gas is approximately 136 g/mol.
Select the correct answer.
Iron oxide reacts with aluminum to give aluminum oxide and iron. What kind of chemical reaction is this?
Answers
Answer:
Single-replacement reaction
Explanation:
Single-replacement reactions, aka. single-displacement reactions, involve one element/ion in a compound being replaced by another element/ion. In this case, aluminum is replacing the iron in the compound.
If you need help visualizing, the equation looks like this:
Fe₂O₃ + Al³⁺ --> Al₂O₃ + Fe³⁺
2
3 of 6 - SCH4U
Date: Name(s):
4. HCl is a corrosive colourless gas that dissolves readily in water.
Aqueous HCl reacts with NaOH to form water and NaCl. In a simple
calorimeter, a 100.00 mL sample of 0.415 mol/L HCl(aq) is mixed
with 50.00 mL of excess NaOH(aq). During the reaction, there is a
rise in temperature by 4.83 °C. Calculate the molar enthalpy change
(in kJ/mol) for the above reaction. SHOW ALL YOUR WORK.
Answers
Answer: The molar enthalpy change is 73.04 kJ/mol
Explanation:
\(HCl+NaOH\rightarrow NaCl+H_2O\)
moles of HCl= \(molarity\times {\text {vol in L}}=0.415mol/L\times 0.1=0.0415mol\)
As NaOH is in excess 0.0415 moles of HCl reacts with 0.0415 moles of NaOH.
volume of water = 100.0 ml + 50.0 ml = 150.0 ml
density of water = 1.0 g/ml
mass of water = \(volume \times density=150.0ml\times 1.0g/ml=150.0g\)
\(q=m\times c\times \Delta T\)
q = heat released
m = mass = 150.0 g
c = specific heat = \(4.184J/g^0C\)
\(\Delta T\) = change in temperature = \(4.83^0C\)
\(q=150.0\times 4.184\times 4.83\)
\(q=3031.3J\)
Thus 0.0415 mol of HCl produces heat = 3031.3 J
1 mol of HCL produces heat = \(\frac{3031.3}{0.0415}\times 1=73043.3J=73.04kJ\)
Thus molar enthalpy change is 73.04 kJ/mol
A geologist measures the height of a mountain.the height is 5.3489km what is the height in meters write your answer in decimal
Answers
Height of a mountain is 5348.9 meter.
1 kilometer is equal to 1000 meter.
The meter, symbol m, is the primary unit of period in the international system of gadgets, although its prefixed paperwork also are used relatively regularly.
A meter is a general metric unit identical to about three feet 3 inches. This means that a meter is part of the metric gadget of dimension. Guitars, baseball bats, and backyard sticks are examples of items which might be approximately one meter lengthy. Meters also are used to measure distances in races, inclusive of strolling and swimming.
Meter readings tell power suppliers how a lot gasoline and energy you are the use of. In case you do not give your provider meter readings they may have to guess your usage. You typically turn out to be paying too much or too little while this occurs.
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What is the formula mass of ZrF4?
Answers
Answer:
167.217g/mol
Explanation:
Formula mass is defined as the mass in grams that a mole of a molecule weighs. To solve the formula mass of ZrF₄ we require the molar mass of Zr and of F (Molar mass Zr: 91.225g/mol; F: 18.998g/mol)
In this molecule, there is 1 mole of Zr and 4 moles of F. The formula mass is:
Zr = 1*91.225g/mol = 91.225g/mol
F = 4*18.998g/mol = 75.992g/mol
Formula mass: 91.225g/mol + 75.992g/mol
167.217g/molI need help please:
Zootopia:
This movies theme is on stereotypes within culture and the influence police have on the Publics perception. Explain how this can happen and it’s impact on civil and criminal justice.
Answers
Answer:
down below
Explanation:
The police's influence can happen based on a response to a problem. An example is when the police are called because of a thief child. If the police handles the situation correctly-using reasonable force, if necessary, and reading them their rights- the public will perceive the police in a good light or way. If the police use gross misconduct and do not go by the book, then they will be perceived as an enemy or in a bad light or way.
A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of dimethyl sulfoxide, acetone, diethytamin, tetrahydrofuran, and carbon tetrachloride. The chemist plans to identify the unknown liquid by measuring the density and comparing to known densities. First, from her collection of Material Safety Data Sheets (MSOS), the chemist finds the following information: Next, the chemist measures the volume of the unknown liquid as 0.767 L and the mass of the unknown liquid as 682. g. Calculate the density of the liquid. Round your answer to 3 significant digits. g. cm^-3 Given the data above, is it possible to identify the liquid? yes no If it is possible to identify the liquid, do so. dimethyl sulfoxide acetone diethylamine tetrahydrofuran carbon tetrachloride times 10
Answers
Yes, it is possible to identify the liquid, and the density of the liquid is closest to 0.889 g/cm³ so the liquid is most likely tetrahydrofuran.
To calculate the density of the unknown liquid, we use the formula:
Density = Mass / Volume
Substituting the given values, we get:
Density = 682. g / 0.767 L
Density = 888.5 g/L
Rounding to three significant digits, the density of the unknown liquid is 889 g/L.
Using the information provided in the question, we can compare the density of the unknown liquid to the known densities of the listed chemicals. The densities (in g/cm³) of the chemicals are:
Dimethyl sulfoxide: 1.092
Acetone: 0.790
Diethylamine: 0.707
Tetrahydrofuran: 0.889
Carbon tetrachloride: 1.594
Comparing the density of the unknown liquid to the known densities, we see that it is closest to the density of tetrahydrofuran, which is 0.889 g/cm³. Therefore, it is likely that the unknown liquid is tetrahydrofuran.
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A large ballon will burst at a volume of 420. L with a pressure of 0.465 atm. If the ballon originally has a volume of 255 L with a pressure of 750.mm Hg at 22 degress celcuis, at what temperature in celcuis will the ballon burst?
Answers
The balloon will burst at a temperature of approximately 159°C.
To solve this problem, we can use the combined gas law, which relates the pressure, volume, temperature of a gas:
\((P_1V_1)/T_1 = (P_2V_2)/T_2\)
First, we need to convert the initial pressure of 750 mmHg to atm:
750 mmHg x 1 atm/760 mmHg = 0.987 atm
Then we can plug in the values we know and solve for \(T_2\):
(0.987 atm x 255 L) / (295 K) = (0.465 atm x 420 L) / T2
Simplifying and solving for \(T_2\), we get:
T2 = (0.987 atm x 255 L x 295 K) / (0.465 atm x 420 L) = 433 K
Convert the temperature to Celsius:
T2 = 433 K - 273.15 = 159.15°C
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The volume of a sample of gas (2.49 g) was 752 mL at 1.98 atm and 62°C. The gas is most likely __________.
A. SO2
B. SO3
C. NH3
D. NO2
E. Ne
Answers
The gas that has a volume of 752 mL at 1.98 atm and 62°C is most likely NO₂ (option D).
How to calculate volume?The volume of a sample of gas can be calculated using the following formula:
PV = nRT
Where;
P = pressureV = volume n = number of molesR = gas law constantT = temperatureAccording to this question, the volume of a sample of gas (2.49 g) was 752 mL at 1.98 atm and 62°C. The number of moles is as follows:
1.98 × 0.752 = n × 0.0821 × 335
1.489 = 27.5n
n = 0.054mol
molar mass of the gas = 2.49g ÷ 0.054mol = 45.99g/mol
The gaseous substance with the molar mass of 45.99g/mol is NO₂.
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are either positively charged or negatively charged species in which the number of protons and electrons are not equal. ____________ bonds are chemical bonds that results from the sharing of electrons. ____________ are positively charged ions with more ____________ than ____________ . ____________ ion is an example of a polyatomic anion. ____________ is the system of assigning an unambiguous name to a compound.
Answers
Answer:
1. Ions are either negatively or positively charged species in which the number of electrons and protons are not equal.
2. The chemical bond that arises due to the sharing of electrons is termed a covalent bond.
3. The positively charged ions are called cations, which comprise more protons than electrons.
4. An example of a polyatomic anion is the hydroxide anion.
5. The system of assigning an unambiguous name to a compound is called nomenclature.
when you hear organic what does it mean?
Answers
Answer:
The word “organic” refers to how a food is grown. ... However, without preservatives and fewer chemicals than regular produce, you might notice that organic foods taste fresher.
Answer:
The phrase hear, hear seems to have come into existence as an abbreviation of the phrase hear him, hear him, which was well-established in Parliament in the late seventeenth century. ... When you say hear, hear, you are in fact saying that you agree with something another person has just said.
Explanation:
hope it's help you
A solution with a total volume of 1000.0 mL contains 37.1 g Mg(NO3)2. If you remove 20.0 mL of this solution and then dilute this 20.0 mL sample with water until the new volume equals 500.0 mL, what is the concentration of Mg+2 ion in the 500.0 mL of solution? What is the concentration of nitrate ion?
Answers
1. The concentation of the magnesium ion, Mg²⁺ in the solution is 0.01 M
2. The concentation of the nitrate ion, NO₃⁻ in the solution is 0.02 M
We'll begin by obtaining the concentration of the stock solution. This can be obtained as follow:
Mass of Mg(NO₃)₂ = 37.1 gMolar mass of Mg(NO₃)₂ = 148 g/moleMole of Mg(NO₃)₂ = 37.1 / 148 = 0.25 moleVolume = 1000 mL = 1000 / 1000 = 1 LConcentration =?Concentration = mole / volume
Concentration = 0.25 / 1
Concentration = 0.25 M
Next, we shall determine the concentration of the diluted solution
Volume of stock solution (V₁) = 20 mLConcentration of stock solution (C₁) = 0.25 MVolume of diluted solution (V₂) = 500 mL Concentration of diluted solution (C₂) =?C₁V₁ = C₂V₂
0.25 × 20 = M₂ × 500
5 = M₂ × 500
Divide both side by 500
C₂ = 5 / 500
C₂ = 0.01 M
1. How to determine the concentration of magnesium ion, Mg²⁺
Mg(NO₃)₂(aq) <=> Mg²⁺(aq) + 2NO₃⁻(aq)
From the balanced equation above,
1 mole of Mg(NO₃)₂ contains 1 mole of Mg²⁺
Therefore,
0.01 M Mg(NO₃)₂ will also contains 0.01 M Mg²⁺
Thus, the concentration of Mg²⁺ is 0.01 M
2. How to determine the concentration of nitrate ion, NO₃⁻
Mg(NO₃)₂(aq) <=> Mg²⁺(aq) + 2NO₃⁻(aq)
From the balanced equation above,
1 mole of Mg(NO₃)₂ contains 2 mole of NO₃⁻
Therefore,
0.01 M Mg(NO₃)₂ will contain = 0.01 × 2 = 0.02 M NO₃⁻
Thus, the concentration of NO₃⁻ is 0.02 M
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What is another example, in real life, where we can prove that gases exist even though we can not see them? Explain why you believe this is a good example.
Answers
Well, us human being rely on \(o_{2}\) (oxygen). We human beings breathe this in every day because we need it to survive. This is a good example because it explains how humans don't see \(o_{2}\) but use it every day.
reaction of bicarbonate and hydroxide
Answers
HCO3- + OH- → H2O + CO32-
This reaction is an example of an acid-base reaction, where the bicarbonate ion acts as a weak acid and the hydroxide ion acts as a strong base. The reaction can be thought of as a neutralization reaction, where the acidic and basic species react to form a neutral product (water) and a salt (carbonate ion). The release of carbon dioxide gas is often observed in this reaction, which can cause bubbling or effervescence.
Answer:
NaHCO3 + NaOH → Na2CO3 + H2O.
Explanation:
A saturated hydrocarbon having molecular formula CnH2n+2 diffuses through a porous membrane twice as fast as sulphur dioxide. Calculate the volume occupied by the hydrocarbon at27°C and 2atm ?
Help me fast !
Answers
Answer:
12.3 L
Explanation:
Now we have that the rate of diffusion of the saturated hydrocarbon is R1
Rate of diffusion of sulphur dioxide is R2
Molar mass of hydrocarbon is M1
Molar mass of sulphur dioxide is 64 gmol-1
From Graham's law;
R1/R2 = √64/M1
2/1 =√64/M1
(2/1)^2 = (√64/M1)^2
4/1 = 64/M1
4M1 =64
M1 = 16
To obtain the number of moles of the gas;
(n*12) + (2n + 2) 1 = 16
12n + 2n + 2 = 16
14n + 2 = 16
14n = 16 - 2
n = 14/14
n = 1
Hence the hydrocarbon is CH4
Volume occupied by CH4 at STP = 22.4 L
Hence;
P1 = 1 atm
T1 = 273 K
V1 = 22.4 L
T2 = 300 K
P2 = 2 atm
V2 = ?
P1V1/T1 = P2V2/T2
P1V1T2 = P2V2T1
V2 = P1V1T2/P2T1
V2 = 1 * 22.4 * 300/2 * 273
V2 = 12.3 L
The volume occupied by the hydrocarbon at 27 °C and 2 atm is 12.31 L
Let the hydrocarbon be initially at standard temperature and pressure (STP)
Thus, we can obtain the new volume of the hydrocarbon by using the combined gas equation as illustrated below:
Initial volume (V₁) = STP = 22.4 L Initial pressure (P₁) = STP = 1 atmInitial temperature (T₁) = STP = 273 KFinal temperature (T₂) = 27 °C = 27 + 273 = 300 KFinal pressure (P₂) = 2 atmFinal volume (V₂) =?P₁V₁ / T₁ = P₂V₂ / T₂
(1 × 22.4) / 273 = (2 × V₂) / 300
22.4 / 273 = (2 × V₂) / 300
Cross multiply
273 × 2 × V₂ = 22.4 × 300
546 × V₂ = 6720
Divide both side by 546
V₂ = 6720 / 546
V₂ = 12.31 L
Thus, the volume occupied by the hydrocarbon at 27 °C and 2 atm is 12.31 L
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https://brainly.com/question/25967416
Which below represents stored energyGroup of answer choicespotentialkineticneitherboth
Answers
Both
Kinetic energy is the energy stored in a body because of its speed and potential energy is the energy stored because of its position in physic field such us gravitational, electric or magnetic fields