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

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Last updated about 2 hours ago
5 questions
1
1
1
1
1
Question 1
1.
What is the molecular formula of a compound comprised of 49.47% C, 5.201% H, 28.84% N, and 16.48% O, with a molecular mass of 194.2 g/mol?

a. Step 1 - Empirical Formula _______
b. Step 2 - Empirical Mass _______ g/mol
c. Step 3 - Molecular Mass _______ g/mol
d. Step 4 - Formula Units _______
e. Step 5 - Molecular Formula _______
Question 2
2.
What is the molecular formula of a compound that contains 92.3% C and 7.70% H with a molecular mass of 78.1 g/mol?

a. Step 1 - Empirical Formula _______
b. Step 2 - Empirical Mass _______ g/mol
c. Step 3 - Molecular Mass _______ g/mol
d. Step 4 - Formula Units _______
e. Step 5 - Molecular Formula _______
Question 3
3.
What is the molecular formula of a compound that contains 24.3% C, 4.10% H, and 71.6% Cl with a molecular mass of 99.0 g/mol?

a. Step 1 - Empirical Formula _______
b. Step 2 - Empirical Mass _______ g/mol
c. Step 3 - Molecular Mass _______ g/mol
d. Step 4 - Formula Units _______
e. Step 5 - Molecular Formula _______
Question 4
4.
What is the molecular formula of a compound that contains 28.03% Mg, 21.60% Si, 1.16% H, and 49.21% O with a molecular mass of 520.8 g/mol?

a. Step 1 - Empirical Formula _______
b. Step 2 - Empirical Mass _______ g/mol
c. Step 3 - Molecular Mass _______ g/mol
d. Step 4 - Formula Units _______
e. Step 5 - Molecular Formula _______
Question 5
5.
What is the molecular formula of a compound with an empirical formula of NH2 with a molecular mass of 32.06 g/mol?

a. Empirical Mass _______ g/mol
b. Molecular Mass _______ g/mol
c. Formula Units _______
d. Molecular Formula _______