Asked Oct 8, 2019

22.0 g of CO​​2 gas and 9.01 g of H​​2O gas are formed from combustion of an unknown hydrocarbon (containing only hydrogen and carbon) in the presence of O​​2 gas. The molar mass of the gas is 84.2 g/mol. What is its molecular formula? 


Expert Answer

Step 1

The compound contains only Carbon and Hydrogen atoms. The amount of Carbon and Hydrogen is determined as given,


Image Transcriptionclose

44.01 g CO, contains 12.01 g C 12.01 g C Mass of C in 22.0 g CO, 22.0 g CO2 44.01 g CO2 = 6.0 g C 18.02 g H2O contains 2.02 g H 2.02 g H Mass of H in 9.01 g H,O = 9.01 ^H18.02 g H,O =1.01 g H

Step 2

Determine empirical formula...


Image Transcriptionclose

Mass No.of molesMolar mass 6.0 g 0.5 mol No. of moles of Carbon = 12.01 g/mol 1.01 g H 1.01 g/mol No.of moles of Hydrogen 1 mol C H No. of moles: 0.5 mol : 1 mol 1 mol 0.5 mol Divide with least no. 0.5 mol 0.5 mol 1 2 Empirical formula: CH


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: Identify the products formed in this Brønsted-Lowry reaction.   HCO−3+F−↽−−⇀acid+base

A: Conjugate acid and conjugate base are produced during a Bronsted-Lowy acid base reaction.


Q: Which of the following would be expected to be the most soluble in water? not possible to decide н H...

A: Click to see the answer


Q: A doxycycline calcium syrup is preserved using 0.08% w/v methylparaben, 0.02% w/v propylparaben, and...

A: Determine ratio strength of 0.08% w/v methylparaben:


Q: An instrument is sensitive to laser light packets that carry at least 2.78 × 10-15 J of energy. How ...

A: Energy of 1 photon is calculated as follows,


Q: How many grams of solute are present in 19.0 mL of 0.746 M K2Cr2O7? If 13.6 g of (NH4)2SO4 is dissol...

A: Given:Volume of solution = 19.0 mL Molarity =  0.746 M We need to calculate the mass of solute in g....


Q: What are the diagams for nitrogen reacting with hydrogen to form ammonia, solid iron melting and sod...

A: The diagrams for nitrogen reacting with hydrogen to form ammonia, solid iron melting and sodium chlo...


Q: How many grams of magnesium hydroxide,Mg(OH)2, are present in 4.52 moles of this compound? _____gram...

A: The values are given as follows:


Q: A three-step process for producing molten iron metal from Fe2O3 is: 3Fe2O3 + CO → 2Fe3O4 + CO2 Fe3O...

A: The moles of iron produced from of iron oxide can be calculated as


Q: Consider 100.0-g samples of two different compounds consisting only of carbon and oxygen. One compou...

A: According to the law of multiple proportions when two elements react together to form more than one ...