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: _______
Question 2
2.
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: _______
Question 3
3.
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: _______
Question 4
4.
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: _______
Question 5
5.
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