3. Chemical Reactions

Mass Percent

Open Question
What is the percent composition of Mg in the compound Mg₃(PO₄)₂?
691
views
Open Question
What is the percent by mass of chlorine in NaCl? Use mc002-1.jpg. 35.45% 39.34% 60.66% 70.90%
776
views
Open Question
What is the mass percentage of C in CH3CH3? Provide an answer to two decimal places.
982
views
Open Question
An oxide of iron has the formula Fe₃O₄. What mass percent of iron does it contain
631
views
Open Question
What is the mass percentage of c in caffeine, C₈H₁₀N₄O₂? Provide an answer to two decimal places.
534
views
Open Question
What is the alcohol content of a 20-oz beer that contains 5% alcohol?
576
views
Open Question
Which element is in the greatest amount in what is referred to as a starter fertilizer?
425
views
Multiple Choice
A sample of white gold contains 18.0 g gold, 3.0 g silver, 2.0 g cobalt, and 1.0 g platinum. What is the mass percent of platinum in the sample?
390
views
Multiple Choice
A solution is prepared by dissolving 98.6 g of NaCl in enough water to form 875 mL of solution. Calculate the mass percent of NaCl in the solution if the density of the solution is 1.06 g/mL.
373
views
Multiple Choice
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?
343
views
Multiple Choice
What is the percent by mass of sodium chloride in a 1.40 M NaCl solution with a density of 1.07 g/mL?
383
views
Multiple Choice
What is the mass percentage of carbon in dimethyl sulfoxide (C2H6SO), rounded to three significant figures?
416
views
Multiple Choice
What is the mass percentage of carbon (C) in caffeine, C₈H₁₀N₄O₂? Provide an answer to two decimal places.
395
views
Multiple Choice
What is the mass percent (m/m%) of a solution if 20 grams of solute is dissolved in 80 grams of solvent?
421
views
Multiple Choice
What is the mass percent composition of carbon in carbon dioxide (CO2)?
437
views