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Molar Mass & Stoichiometry

Molar Mass & Stoichiometry. What is the Molar Mass of Mg(OH) 2 ?. 41.32 g/mole 42.33 g/mole 58.33 g/mole 827.03 g/mole Not listed. What is the Molar Mass of H 3 PO 4 ?. 47.98 g/mole 95.96 g/mole 98.00 g/mole 196.00 g/mole Not listed.

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Molar Mass & Stoichiometry

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  1. Molar Mass & Stoichiometry

  2. What is the Molar Mass of Mg(OH)2 ? • 41.32 g/mole • 42.33 g/mole • 58.33 g/mole • 827.03 g/mole • Not listed

  3. What is the Molar Mass of H3PO4? • 47.98 g/mole • 95.96 g/mole • 98.00 g/mole • 196.00 g/mole • Not listed

  4. Convert 125.25 g of Sulfur (S8) (MM = 256.56 g) to moles. • 0.48819 moles • 3.9055 moles • 4.4588 moles • 157.32 moles • 4016.8 moles • Not listed

  5. Convert 3.75 moles of BaSO4 to grams.(MM = 233.4 g) • 875 g • 233.40 g • 62.2 g • 0.0161 g • Not listed

  6. Convert 2.50 moles of KCl (MM = 74.55 g) to molecules. • 4.15 x 10-24molecules • 1.51 x 1024 molecules • 6.02 x 1023 molecules • 6.78 x 1025 molecules • Not listed

  7. Convert 70.0 g of LiBr (MM = 86.84 g) to molecules. • 7.47 x 1023 molecules • 4.21 x 1025 molecules • 3.65 x 1027molecules • 4.85 x 1023molecules • Not listed

  8. Stoichiometry Mole Ratios

  9. Given the reaction2 PbS + 3 O2 2 PbO + 2 SO2239.27 32.00 223.20 64.07 g/mole • 261.6 grams • 116.3 grams • 174.4 grams • 223.2 grams • 186.9 grams • Not listed 25.00 g of O2 will yield how many grams of PbO?

  10. Given the reaction4 Al + 3 O2 2 Al2O326.98 32.00 101.96 g/mole • 920 grams • 6200 grams • 460 grams • 61 grams • 230 grams • Not listed 4.5 moles of Al will yield how many grams of Al2O3?

  11. Given the reaction2 C6H14 + 19 O2 12 CO2 + 14 H2O86.20 32.00 44.01 18.02 g/mole • 5.9354 x 1026 molecules • 8.4792 x 1025 molecules • 1.2113 x 1025 molecules • 6.8856 x 1024 molecules • 2.8812 x 10-21 molecules • Not listed 140.85 grams of C6H14 will yield how many molecules of H2O?

  12. Percent Composition,Empirical FormulasMolecular Formulas

  13. What is the % mass of lead in PbO2? • 86.62% • 92.83% • 13.37% • 6.69% • 13.37% • Not listed

  14. What is the % mass of Cu in Cu2S? • 66.46% • 39.93% • 79.85% • 20.14% • 33.54% • Not listed

  15. What is the % mass of nitrogen in Ba(NO3)2? • 5.36% • 10.72% • 16.08% • 47.45% • 23.73% • Not listed

  16. What is the mass of oxygen in 54 g of H2O. • 47.94 g • 16.00 g • 6.05 g • 3.02 g • Not listed

  17. A compound is found to contain 53.70% iron and 46.30% sulfur. What is the empirical formula of this compound? • FeS • FeS2 • Fe2S3 • Fe3S2 • Not listed

  18. A compound contains 4.04 g of N and 11.46 g of O. What is the compound’s empirical formula? • NO • N2O7 • N5 O2 • N2O5 • Not listed

  19. The molar mass of a compound is 283.89 g/mol. If the empirical formula is P2 O5, what is its molecular formula? • P4 O10 • P4 O5 • P10O50 • P2O5 • Not listed

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