Q. Find the percent composition of Cu₂S?

Q. A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?

Q. Which of the following is considered an empirical formula?

Q. What is the percentage of oxygen in carbon dioxide? (CO2)

Q. You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements.

Q. What is the empirical formula if you have 81.82% carbon and 18.18% hydrogen?

Q. A formula with the lowest whole # ratio of elements in a compound is called

Q. What is the percentage of chlorine in sodium chloride? (NaCl)

Q. What is the percentage of iron in iron(III)oxide?

Q. Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.