3. Chemical Reactions

What is the mass percentage of carbon (C) in C2H2 (acetylene)? Provide your answer to two decimal places.

What is the mass percent of aluminum (Al) in aluminum sulfate, Al_2(SO_4)_3?

What is the percent by mass of potassium (K) in KMnO4?

What is the mass percent of sodium (Na) in a formula unit of sodium hydrogen carbonate (NaHCO_3)?

A sample of glucose (C6H12O6) has a molar mass of 180.16 g/mol. What is the percent composition of carbon in glucose?

What is the mass percent of oxygen in sodium carbonate (Na2CO3)?

How many grams of glucose are required to prepare 400 mL of a 2.0% (m/v) glucose solution?

A solution is 4.00% NaOH by mass. What mass of this solution contains 15.0 g of NaOH?

What is the percent by mass of potassium (K) in K3Fe(CN)6?

Which of the following best describes the molecular ion formed in a mass spectrometer for a given molecule?

What is the percent by mass of magnesium sulfate (MgSO_4) in magnesium sulfate heptahydrate (MgSO_4 · 7H_2O)?

What is the mass percent of silver in silver chloride (AgCl)?

What is the mass percent of silicon in silicon dioxide (SiO_2)?

If 2.45 g of sugar is dissolved in 200.0 g of water, what is the mass percent of sugar in the resulting solution?

What is the mass percent of oxygen in H2O?