3. Chemical Reactions

Which of the following best describes the percent composition (mass percent) of a compound?

What is the mass percent of sulfur in SO_2?

What is the approximate percent by mass of potassium (K) in potassium bicarbonate (KHCO3)?

What is the mass percent of Na in NaF? Provide your answer to two decimal places.

An alloy used in aerospace applications contains 15.0 g of titanium in a 120.0 g sample. What is the mass percent of titanium in the alloy?

What is the mass percent of sodium (Na) and chlorine (Cl) in NaCl?

A solution is prepared by dissolving 17.5 g of MgCl_2 in 85.0 g of H_2O. What is the mass percent of MgCl_2 in the solution?

What is the mass percent of iron in iron(III) chloride (FeCl_3)?

Calculate the experimental mass % of c and h in the unknown liquid used in the experiment.

What is the mass percent of carbon in testosterone (C19H28O2)?

Which statement best describes the mass percent of water in an apple if the apple has a total mass of 150 g and contains 120 g of water?

Which of the following solutions has the highest mass/volume percent (% m/v)?

What is the percent by mass of water in Na2SO4 · 10H2O?

Which of the following sets of information is required to calculate the mass percent (percent composition) of an element in a compound?

What is the percent by mass of nitrogen in N_2O?