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- 1. Multiple ChoiceWhat is the percent composition by mass of sulfur in the compound MgSO4 (gram formula mass = 120 g/mol)?20%27%46%53%
- 2. Multiple ChoiceWhat is the percent by mass of oxygen in MgO?20%40%50%60%
- 3. Multiple ChoiceWhat is the percent by mass of fluorine in CaF2 (gram-formula mass = 78 g/mol)?24%49%51%65%
- 4. Multiple ChoiceWhat is the percent by mass of magnesium in MgO?20%40%50%60%
- 5. Multiple ChoiceYou are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements. (keep two decimal places throughout calculations)SOSO2SO3SO4
- 6. Multiple ChoiceWhat is the empirical formula if you have 88.80% copper and 11.20% oxygen?Cu3O8CuO4Cu2OCu4O10
- 7. Multiple ChoiceWhich one is empirical?H2O2C2H6O12CaCl2N2O8
- 8. Multiple ChoiceWhat is the empirical formula for the following molecular formula: C6H14C6H14C3H7CH2CH3
- 9. Multiple ChoiceWhat is the molecular formula if the empirical formula is C2H5 and the molecular molar mass is 58.14 g/mol?C2H5C4H10C1H2.5C4H8
- 10. Multiple ChoiceGlycerol has a molar mass of 92.09g/mol. Its percent composition is: 39.12% C, 8.75% H, and 51.12% O. What is the molecular formula for glycerol?C2H3O2CH2OC2H4O2C3H8O3
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