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Percent Composition and Molar Mass

Quiz by Nicole Basile

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10 questions
Show answers
  • Q1
    What is the percentage composition by mass of nitrogen in NH3?
    60.50%
    82.35%
    30.25%
    45.12%
    30s
  • Q2
    What is the molar mass of H2SO4?
    68.03 g/mol
    120.16 g/mol
    86.23 g/mol
    98.08 g/mol
    30s
  • Q3
    What is the percentage composition by mass of oxygen in Na2CO3?
    38.83%
    23.66%
    47.39%
    58.44%
    30s
  • Q4
    What is the molar mass of NaCl?
    32.06 g/mol
    58.44 g/mol
    120.16 g/mol
    86.23 g/mol
    30s
  • Q5
    What is the percentage composition by mass of sulfur in H2SO4?
    57.02%
    32.67%
    43.68%
    69.27%
    30s
  • Q6
    What is the molar mass of CO2?
    44.01 g/mol
    36.95 g/mol
    52.25 g/mol
    27.05 g/mol
    30s
  • Q7
    What is the percentage composition by mass of chlorine in NaCl?
    45.12%
    82.35%
    30.33%
    60.66%
    30s
  • Q8
    What is the molar mass of CaCO3?
    120.16 g/mol
    100.09 g/mol
    86.23 g/mol
    68.03 g/mol
    30s
  • Q9
    What is the percentage composition by mass of hydrogen in H2SO4?
    2.06%
    12.13%
    8.14%
    19.55%
    30s
  • Q10
    What is the molar mass of FeCl3?
    86.23 g/mol
    120.16 g/mol
    162.2 g/mol
    65.38 g/mol
    30s

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