3. Chemical Reactions

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?

What is the mass percent of hydrogen in methane (CH_4)?

What is the mass percent of Mg in the compound Mg_3(PO_4)_2?

Which of the following best describes what mass measures in chemistry?

Which of the following statements about mass is correct?

What is the mass percent of oxygen in water (H_2O)?

What is the percent by mass of magnesium in MgO?

What is the mass percent of aluminum in the compound Al2O3?

What is the approximate mass percent of nitrogen and oxygen in nitrogen dioxide (NO_2)?

What is the mass percent of carbon (C) in C2H6O (ethanol)? Provide your answer to two decimal places.