3. Chemical Reactions

Which of the following statements about empirical and molecular formulas is correct?

What is the empirical formula of $N_2{O}_4$?

Which pair of compounds has the same empirical formula?

How many sulfur atoms are present in the empirical formula for sodium sulfate?

Which of the following is the empirical formula for C_2H_6?

Which of the following is NOT an empirical formula?

What is the empirical formula of a compound that contains 49.4% K, 20.3% S, and 30.3% O by mass?

A compound is found to be 30.45% nitrogen (N) and 69.55% oxygen (O) by mass. If 1.63 g of this compound occupy 389 mL at 0.00°C and 775 mm Hg, what is the empirical formula of the compound?

How many atoms of oxygen are present in the empirical formula of calcium phosphate?

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

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

What is the empirical formula for $C_2{H}_6$?

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?