Asked Oct 11, 2019

A 2.00 L tank contains an unknown gas that is 53.31% carbon, 11.18% hydrogen, and 35.51% oxygen by mass. At 35.0 °C and 0.470 bar, the gas in the tank has a mass of 3.30 g.

What is the empirical formula of the gas?

empirical formula:__________________________

How many moles of gas are in the tank?

moles of gas: _____________________ mol

What is the molecular formula of the gas?

molecular formula: _________________


Expert Answer

Step 1


An unknown gas that is 53.31% carbon, 11.18% hydrogen, and 35.51% oxygen by mass. this means that 100 g of the gas contains:

Mass of carbon = 53.31 g

Mass of hydrogen = 11.18 g

Mass of oxygen = 35.51 g

Moles of C, H and O can be calculated as:


Image Transcriptionclose

53.31 g Mass Moles of C 4.44 mol Molar mass 12 g/mol 11.18 g Mass Moles of H 11.18 mol Molar mass 1 g/mol 35.51 g Mass Moles of O = 2.22 mol Molar mass 16 g/mol

Step 2

The empirical formula of the gas can be written by finding the simplest whole molar ratio as:


Image Transcriptionclose

4.44 mol =2 2.22 mol С - 11.18 mol = 5 2.22 mol Н- 2.22 mol O = 2.22 mol 1 The empirical formula is C2H5O

Step 3


Pressure, P = 0.470 bar = 0.464 atm      ( 1 bar = 1/1.013 atm)

Volume, V = 2.00 L

Temperature, T = 35.0 °C = (...


Image Transcriptionclose

PV nRT PV n RT 0.464 atm x 2.00 L L atm 0.0821 x 308 K mol K n 0.0367 mol


Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in



General Chemistry

Related Chemistry Q&A

Find answers to questions asked by student like you
Show more Q&A

Q: 11. Describe the geometry around each of the three central atoms in the CH3COOH molecule.

A: The Lewis structure of the given compound with lone pairs around the central atoms only is shown bel...


Q: MInbox (5) - A ALEKS Daniel Estrella - Pre-Clas X bAnswered: NAverage Bond Enth...

A: Aqueous sulfuric acid (H2SO4) reacts with solid NaOH to produce aqueous sodium sulfate (Na2SO4) and ...


Q: Given a solution of NaOH in Water that has a molarity of .04M, that contains .08 g of NaOH or .002 m...

A: Solution stoichiometry involves the calculation of concentration of solutions in the given condition...


Q: An object has a mass of 0.0124kg and a volume of 1893mm3. What is it’s density in grams per cubic ce...

A: Given:As we need to calculate the density in g/cc convert the mass into g and volume into cc.Mass = ...


Q: Calculate theoretical yield and percent yield in the following question. For the reaction CuSO4 +2Na...

A: In chemistry, there are many ways to check the deviation of experimental data from the accurate valu...


Q: Match the condensed structural formula on the left with the functional group classification on the r...

A: Click to see the answer


Q: Compare the effect of acid rain in different types of materials such limestone, marble and bronze. I...

A: Acid rain can be considered as any kind of precipitation which contains large amount of nitric and s...


Q: If the crucible originally weighs 3.715 g and 2.000 g of hydrate are added to it, what is the weight...

A: Given:Mass of crucible =  3.715 gMass of hydrate = 2.000 gMass of crucible and anhydrous salt = 5.07...


Q: 3. Drawing Reaction Mechanism Arrows For the reactions that have TWO starting materials, indicate an...

A: Hey, since there are multiple sub-parts posted, we will answer first-three sub-parts. If you want an...