• How many millimoles of Ca(NO3)2 contain 4.78 × 10^22 formula units of Ca(NO3)2? The molar mass of Ca(NO3)2 is 164.10 g/mol.
    • 12.6 mmol Ca(NO3)2
    • 13.0 mmol Ca(NO3)2
    • 20.7 mmol Ca(NO3)2
    • 79.4 mmol Ca(NO3)2
    • 57.0 mmol Ca(NO3)2

  • Determine the volume of hexane that contains 5.33 × 10^22 molecules of hexane. The density of hexane is 0.6548 g/mL and its molar mass is 86.17 g/mol.
    • 8.59 mL
    • 13.5 mL
    • 7.40 mL
    • 12.4 mL
    • 11.6 mL
  • Determine the molecular formula of a compound that has a molar mass of 183.2 g/mol and an empirical formula of C2H5O2
    • C2H5O2
    • C6H15O6
    • C3H7O3
    • C4H10O4
    • C8H20O8

  • Determine the empirical formula for a compound that is found to contain 10.15 mg P and 34.85 mg Cl
  • P3Cl
  • PCl
  • PCl2
  • P2Cl3
  • PCl3
  • Determine the empirical formula for a compound that is 70.79% carbon, 8.91% hydrogen, 4.59% nitrogen, and 15.72% oxygen.
    • C18H27NO3
    • C18H27NO2
    • C17H27NO3
    • C17H26NO3
  • Determine the molecular formula of a compound that is 49.48% carbon, 5.19% hydrogen, 28.85% nitrogen, and 16.48% oxygen. The molecular weight is 194.19 g/mol.
    • C8H12N4O2
    • C4H5N2O
    • C8H10N4O2
    • C8H10N2O
  • Combustion analysis of 63.8 mg of a C, H and O containing compound produced 145.0 mg of CO2 and 59.38 mg of H2O. What is the empirical formula for the compound?
    • C5H2O
    • CHO
    • C3H6O
    • C3H7O
    • C6HO3
  • Which of the following compounds is nail polish remover?
    • (CH3)2C=O
    • C2H5OH
    • CH3CO2H
    • CH3CO2CH3
    • CH3OCH3
  • What is the formula for calcium phosphate?
    • CaP
    • Ca2P3
    • Ca2(PO4)2
    • Ca3(PO4)2
    • CaPO4
  • A triple covalent bond contains ___ of electrons
    • 0 pairs
    • 1 pair
    • 2 pairs
    • 3 pairs
    • 4 pairs
  • Identify the compound with the smallest dipole moment in the gas phase
    • Cl2
    • ClF
    • HF
    • LiF
  • Of the following elements, which has the lowest electronegativity?
    • Mg
    • Cl
    • Ca
    • Br