Have an account?
Skip to Content
Build your own quiz
14 questions
Show Answers
See Preview
- 1. Multiple ChoiceWhat is the percent by mass of oxygen in MgO?20%40%50%60%
- 2. Multiple ChoiceWhat is the percent by mass of magnesium in MgO?20%40%50%60%
- 3. Multiple ChoiceFind the percent composition of Cu2S?%Cu= 67.987 %S= 32.013%Cu= 79.854 %S= 20.145%Cu= 35.946 %S= 64.054
- 4. Multiple ChoiceWhat is the percentage of iron in iron(III)oxide?30%70%40%60%
- 5. Multiple ChoiceIn which compound is the percent composition by mass of Cl equal to 42%?HClO (gram formula mass = 52 g/mol)HClO2 (gram formula mass = 68 g/mol)HClO3 (gram formula mass = 84 g/mol)HClO4 (gram formula mass = 100 g/mol)
- 6. Multiple ChoiceA compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?Mg4N3MgN2Mg3N2MgN
- 7. Multiple Choice
Which of the following is considered an empirical formula?
C2H4O2
C6H12O6
H2O
- 8. Multiple ChoiceA formula with the lowest whole # ratio of elements in a compound is calledMolecular FormulaChemical FormulaEmpirical FormulaDistance Formula
- 9. Multiple ChoiceWhich pair has the same empirical formula?NaCrO4 and Na2Cr2O7C2H4O2 and C6H12O6C3H6O3 and C2H6O2CH4 and C2H6
- 10. Multiple ChoiceWhat is the molecular formula for a compound with the empirical formula: K2SO4 and a molecular mass of 696g.K2SO4K8SO16K8S4O8K8S4O16
- 11. Multiple ChoiceWhat is the empirical formula if you have 88.80% copper and 11.20% oxygen?Cu3O8CuO4Cu2OCu4O10
- 12. Multiple Choice
A 5.00 g sample of a compound consisting of calcium and chlorine contains 1.82 g of calcium and 3.23 g of chlorine. What is the empirical formula?
CaCl2
Ca2Cl4
Ca2Cl2
Ca4Cl2
- 13. Multiple ChoiceGiven the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.NaPO2Na2PO3Na3PO4NaPO4
- 14. Multiple ChoiceWhat is the molecular formula if the empirical formula is CH2O and the molecular molar mass is 180.18?CH2OC2H4O2C4H8O4C6H12O6
- Answer choicesTagsAnswer choicesTags