3. Chemical Reactions

What is the empirical formula for a compound that contains 17.34% hydrogen and 82.66% carbon by mass?

Which of the following is the empirical formula for a pentose sugar?

Which of the following chemical formulas is already in its empirical formula?

Which of the following compounds has the empirical formula CH2O?

A compound contains 29% Na by mass. If the only other element present is Cl, what is the empirical formula of the compound?

Determine the empirical formula for a compound that is 36.86% N and 63.14% O by mass.

Which pair of substances has the same empirical formula?

Which of the following is an example of an empirical formula?

A compound contains 31.2% calcium, 28.6% sulfur, and 40.2% oxygen by mass. What is the empirical formula of this compound?

What is the empirical formula for a compound that contains 50.05% sulfur and 49.95% oxygen by mass?

A compound contains 27.0% sulfur and 73.0% oxygen by mass. What is the empirical formula of this compound?

What is the empirical formula of a compound that contains 10.0 g of aluminum and 39.4 g of chlorine?

The molecular formula for vitamin C is C6H8O6. What is the empirical formula?

What is the empirical formula for a compound that is 36.1% Ca and 63.9% Cl by mass?

Which of the following best describes a formula unit in chemistry?