Percent Composition in Solutions Quiz
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Questions and Answers

What is the percentage of carbon in ethane (C2H6)?

  • 80.0% (correct)
  • 75.0%
  • 85.0%
  • 70.0%

    • What is the percentage of oxygen in CaCO3?

  • 45.0%
  • 48.0% (correct)
  • 50.0%
  • 52.0%

    • What is the empirical formula for a chemical compound with 0.556 g C and 0.0933 g H?

  • CH3 (correct)
  • C2H6
  • C3H9
  • CH4

    • A compound contains 0.90 g Ca and 1.60 g Cl, what is its empirical formula?

    <p>CaCl2</p> Signup and view all the answers

    What is the empirical formula of a compound containing 68.12 g C, 13.73 g H, and 18.15 g O?

    <p>C5H12O</p> Signup and view all the answers

    What is the molarity of a solution prepared by dissolving 9.8 moles of solid NaOH in enough water to make 3.62 L of solution?

    <p>2.7 mol/L</p> Signup and view all the answers

    What is the molarity of a solution made by dissolving 152.5 g CuCl2 in water to make a final volume of 2.25 L?

    <p>0.5041 mol/L</p> Signup and view all the answers

    What would part per trillion (ppt) equal to?

    <p>1 µg of solute per kg of solution</p> Signup and view all the answers

    What is the mass percentage of solute in a solution containing 13.5 g of glucose in 100 g of water?

    <p>11.9%</p> Signup and view all the answers

    What is the mass percentage of NaCl in a solution containing 1.50 g of NaCl in 50.0 g of water?

    <p>2.91%</p> Signup and view all the answers

    What is the concentration of Zn2+ in ppm if a 2.5-g sample of groundwater was found to contain 5.4 µg of Zn2+?

    <p>2160 ppm</p> Signup and view all the answers

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