3. Chemical Reactions

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?

What is the mass percent of bromine in the compound NaBr?

What is the percent by mass of chlorine in FeCl_3?

What is the percent by mass of sulfur in sulfur dioxide (SO_2)?

An aqueous KNO3 solution is made using 71.6 g of KNO3 diluted to a total solution volume of 1.80 L. Assuming a density of 1.05 g/mL for the solution, what is the mass percent of KNO3 in the solution?

If you have a solution containing 120 g of NaCl dissolved in 480 g of water, what is the mass percent of NaCl in the solution?

What is the mass percent of carbon in oxalic acid (C2H2O4)?

What is the mass percent of oxygen (O) in carbon dioxide (CO_2)? Provide your answer to two decimal places.

Which formula is used to calculate the percent by mass of an element in a compound?