3. Chemical Reactions

Which of the following represents the empirical formula for the compound x4y8?

Which one of the following molecular formulas is also an empirical formula?

Which pair of compounds has the same empirical formula?

What is the empirical formula of a compound that is composed of 72.4% Fe and 27.6% O by mass?

What is the empirical formula for a compound with the molecular formula C_6H_{12}Cl_2O_2?

Which one of the following is NOT an empirical formula?

A compound contains 1.0 g of sulfur (S) and 1.5 g of oxygen (O). What is the empirical formula of the compound?

A compound has an empirical formula of CH and a molar mass of 39 g/mol. What is its molecular formula?

Which of the following pairs of compounds do NOT have the same empirical formula?

What is the empirical formula of a compound that contains only iron and oxygen and is 22.27% oxygen by mass?

Given that the pseudoformula of ascorbic acid is C_{3.407}H_{4.53}O_{3.406}, what is its empirical formula?

Which of the following pairs of compounds have the same empirical formula?

What is the empirical formula of acetic acid, CH3COOH?

Which of the following could be both a molecular formula and an empirical formula?

Covalent compounds