Mole Practice Problems- Answers

  1.  a.  0.500 mol Rb     b.  0.134 mol Kr
  2. a.  0.6046 x 10^23 molecules    b.  1.5 x 10^24 molecules
  3. a.  3.00 x 10^24 molecules     b.  3.13 x 10^21 molecules
  4. a.  7.53 x 10^23 formula units     b.  3.01 x 10^24 formula units
  5. a. 5.55 mol  copper (II) hydroxide     b. 1.94 x 10^-8 mol hydrosulfuric acid
  6. a.  2.38 mol Al      b.  1.00 mol Si
  7. a. 28.05 g Na     b.  921 g Cu
  8. a.  0.0120 mol boron tribromide     b.  0.0112 mol sodium fluoride
  9. a.  23.28 g ammonia      b. 21.6 g glucose
  10. a.  1.21 x 10^24 atoms Al     b.  3.011 x 10^23 atoms La
  11. a.  1810. g Ta      b. 0.295 g Co
  12. a.  8.08 g hydrogen gas     b.  0.648 g aluminum hydroxide
  13. a.  1.77 x 10^23 formula units sodium sulfide     b. 8.96 x 10^20 formula units nicket (II) nitrate

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