4. Stoichiometry
Chemical Formulas — Quiz
Test your understanding of chemical formulas with 5 practice questions.
Practice Questions
Question 1
A compound contains 40.00% carbon, 6.67% hydrogen, and 53.33% oxygen by mass. If its molar mass is 60.05 g/mol, what is its molecular formula?
Question 2
Calculate the molar mass of iron(II) chloride, FeCl2.
Question 3
A compound contains 36.48% sodium, 25.44% sulfur, and 38.08% oxygen by mass. What is its empirical formula?
Question 4
What is the molecular formula of a compound with an empirical formula of CH and a molar mass of 104.16 g/mol?
Question 5
Calculate the molar mass of lead(IV) oxide, PbO2.