Copy of Molecular Formula 1 (5/28/2026)

Last updated 20 days ago

5 questions

Note from the author:

Instructions

Copy of Molecular Formula 1 (5/28/2026)

Last updated 20 days ago

5 questions

Note from the author:

Instructions

Caffeine is made of 49.48 % C, 5.19% H, 16.48% O and 28.8% N. Find the molecular formula of Caffeine if its overall molecular mass is 194.22 g/mol.

a. Empirical Formula: _______ 
b. Empirical Mass: _______ g/mol
c. Molecular Mass: _______ g/mol
d. Formula Unit: _______ 
e. Molecular Formula: _______ 

An unknown sugar is found to have a molecular mass of 180.18 g/mol. The sugar contains:  40.0 % C, 6.7 % H and 53.3 % O. Find the molecular formula of this sugar.
a. Empirical Formula: _______ 
b. Empirical Mass: _______ g/mol
c. Molecular Mass: _______ g/mol
d. Formula Unit: _______ 
e. Molecular Formula: _______ 

A strong oxidizing agent and rocket propellant has a percent composition of 30.43% N and 69.57% O. Find the molecular formula if its molecular mass is 92.0 g/mol.
a. Empirical Formula: _______ 
b. Empirical Mass: _______ g/mol
c. Molecular Mass: _______ g/mol
d. Formula Unit: _______ 
e. Molecular Formula: _______ 

One phosphorus oxide contains 56.4% P and 43.6% O. If its molecular mass is 220.0 g/mol, find its molecular formula.

a. Empirical Formula: _______ 
b. Empirical Mass: _______ g/mol
c. Molecular Mass: _______ g/mol
d. Formula Unit: _______ 
e. Molecular Formula: _______ 

Tryptophan – the turkey chemical believed to make you sleepy – has the empirical formula C11H12N2O2. Find the molecular formula if the formula mass is 204.25 g/mol
a. Empirical Mass: _______ g/mol
b. Molecular Mass: _______ g/mol
c. Formula Unit: _______ 
d. Molecular Formula: _______ 