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- 1. Multiple ChoiceWhat is the volume occupied by 1 mole of any gas?44.8 L22.4 L16.8 L20.4 L
- 2. Multiple Choice
How many moles are in a 18 L tank of nitrogen gas?
0.9 moles
1 mole
0.8 moles
0.75 moles
- 3. Multiple ChoiceWhat would be the mass of 1.5mol H2O20273240
- 4. Multiple Choice
Which of the following dimensional analysis setups will correctly convert 4.00x1023atoms of cobalt to moles of cobalt? How many moles of colbalt are there?setup B : 0.6644mol Cosetup A: 2.41x1047mol Cosetup A : 0.664mol Cosetup B: 2.41x1047mol Co - 5. Multiple ChoiceWhich of the following dimensional analysis setups will correctly convert 27.76g of Li to atoms of Li?ABCD
- 6. Multiple ChoiceHow many particles are in 13.5 grams of Beryllium?1.5 particles9 particles4x1023 particles9x1023 particles
- 7. Multiple ChoiceWhat is the molar mass of Zn(C2H3O2)2392.8g/mol142.9g/mol361g/mol183.5 g/mol
- 8. Multiple ChoiceThe lowest ratio of atoms in a molecule or formula unit isthe molecular formulathe empirical formulathe correct formulathe nomenclature formula
- 9. Multiple ChoiceWhat is the empirical formula if you have 36.84% nitrogen and 63.16% oxygen?NON2O3N2O4N2O5
- 10. Multiple ChoiceWhich pair has the same empirical formula?NaCrO4 and Na2Cr2O7C2H4O2 and C6H12O6C3H6O3 and C2H6O2CH4 and C2H6
- 11. Multiple ChoiceWhat is the percent composition by mass of sulfur in the compound MgSO4 (gram formula mass = 120 g/mol)?20%27%46%53%
- 12. Multiple ChoiceFind the percent composition of Cu in CuBr2 .28.45%32.85%17.78%68.10%
- 13. Multiple ChoiceWhat is the molecular formula if the empirical formula is CH2O and the molecular molar mass is 180.18?CH2OC2H4O2C4H8O4C6H12O6
- 14. Multiple ChoiceWhat is the molecular formula if the empirical formula is C2H5 and the molecular molar mass is 58.14 g/mol?C2H5C4H10C1H2.5C4H8
- 15. Multiple ChoiceSome average bond enthalpies, in kJ/mol, are as follows:
H-H = 436
Cl-Cl = 242
H-Cl = 431
What is the enthalpy change for the decomposition of hydrogen chloride?
2 HCl --> H2 + Cl2-184 kJ+ 184 kJ- 247 kJ+ 247 kJ - 16. Multiple Choice648 g = ____ mg6,48064,800648,00064.8
- 17. Multiple ChoiceConvert 17 m to cm:0.17 cm0.017 cm1,700 cm170 cm
- 18. Multiple Choice
How many formula units are in 2.5 mol of NaCl?
1.51 x 1023
146
1.51 x 1024
1.5 x 1024
- 19. Multiple ChoiceWhich conversion factor should be used to solve the following, "How many moles of argon atoms are present in 11.2 L of argon gas at STP?"1 mol = 22.4 L1 mol = 39.95 g1 mol = 6.02x1023 atomsMore than 1
- 20. Multiple ChoiceHow many grams are in
1.2 x 1024 atoms of C?23.9 grams24 grams6.02 grams1.2 grams - 21. Multiple Choice
How many liters are in 19.82 g Mg(OH)2?
10.75 liters
10.7 liters
7.615 liters
7.62 liters
- 22. Multiple ChoiceUsing the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 6 moles H2?4 moles Fe6 moles Fe9 moles Fe2 moles Fe - 23. Multiple ChoiceFor the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of Mg to moles Fe?3mol Mg / 2 mol Fe2 mol Mg/ 3 mol Fe1 mol Fe/ 2 mol Fe3 mol MgO / 2 mol Fe
- 24. Multiple ChoiceWhat is the first thing you must do to solve a stoichiometry problem?Write a Balanced EquationPanicWrite an Unbalanced EquationAsk for help
- 25. Multiple ChoiceWhat is the molar mass of (NH4)2CO3 ?144 g138 g96 g78 g
- 26. Multiple Choice
All alkali metal react with water to produce hydrogen gas and the corresponding alkaline metal hydroxide. A typical reaction is that between lithium and water :
2Li(s) + 2H2O(l) →2LiOH(aq) + H2(g)
Calculate the mass of H2 gas formed when 40.0 g of Li react with water.
4.21 g
7.31 g
5.80 g
4.42 g
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