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- 1. Multiple ChoiceMolar masses are determined fromthe mole ratio of a given amount of reactant to an unknown amount of productthe periodic tableany mole ratio in the equationa conversion factor
- 2. Multiple Choice2H2 ( ) + O2 ( )→ 2H2O ( )
How many moles of water can be produced if 8 moles H2 are used?4 moles8 moles16 moles2 moles - 3. Multiple ChoiceN2 ( ) + 3H2 ( )→ 2NH3 ( )
How many moles of hydrogen are needed to react with 5 moles of nitrogen?62315 - 4. Multiple Choice2 KClO3 ( ) → 2 KCl ( ) + 3 O2 ( )
How many moles of oxygen are produced when 6.7 moles of KClO3 decompose completely?6.7 mol1.0 mol10.1 mol4.5 mol - 5. Multiple ChoiceSiO2 ( ) + 3C ( )→ SiC ( ) + 2CO ( )
I need to add 8 moles of Carbon to the reaction. How many grams of Carbon should I weigh?96 g0.67 g2.67 g48 g - 6. Multiple ChoiceC3H8 ( ) + 5 O2 ( )→ 3 CO2 ( ) + 4 H2O ( )
Suppose that an excess of propane, C3H8 burns in 320 g of O2. How many moles of H2O will be formed?0-56-1010-15>15 - 7. Multiple Choice2 H2 ( ) + O2 ( ) → 2 H2O ( )
How many grams of water can be prepared from 8 grams of hydrogen at standard conditions?0-2526-5050-75>75 - 8. Multiple Choice2 CO ( ) + O2 ( )→ 2 CO2 ( )
How many moles of carbon monoxide are needed to react completely with 7.0 moles of oxygen gas?0-56-1011-15>15 - 9. Multiple ChoiceAl2(CO3)3 ( )→ Al2O3 ( ) + 3 CO2 ( )
How many moles of carbon dioxide, CO2, can be formed by the decomposition of 5 moles of aluminum carbonate, Al2(CO3)3?0-56-1011-15>15 - 10. Multiple Choice2 KClO3 ( )→ 2 KCl ( ) + 3 O2 ( )
How many grams of oxygen are produced by the decomposition of 1 mole of potassium chlorate, KClO3?0-2526-5051-75>75 - 11. Multiple Choice2 Na ( ) + Cl2 ( )→ 2 NaCl ( )
A chemist performs the synthesis of sodium chloride from its elements. The chemist begins with 46 grams of sodium. How many moles of chlorine are needed?0-56-1011-15>16 - 12. Multiple Choice2 H2 ( ) + O2( )→ 2 H2O ( )
How many grams of water can be prepared from 5 moles of hydrogen at standard conditions?0-2526-5051-75>75 - 13. Multiple ChoiceWhat is the molar mass of table salt (NaCl)?116.886 g/mol35.453 g/mol22.990 g/mol58.443 g/mol
- 14. Multiple ChoiceWhat is the molar mass of CO2?12163244
- 15. Multiple ChoiceHow many particles are in a mole?602602 million602 moles6.02 x 1023
- 16. Multiple Choice
Calculate the molar mass of Ba(C2H3O2)2
255.3 g/mol
237.3 g/mol
228.3 g/mol
196.3 g/mol
- 17. Multiple Choice
Calculate the molar mass for Al(OH)3
78.0 g/mol
72 g/mol
28 g/mol
25 g/mol
- 18. Multiple Choice
Calculate the molar mass of NH4NO2
50 g/mol
60 g/mol
64 g/mol
78 g/mol
- 19. Multiple ChoiceMolar mass is in units of ________.gramsgrams/molemolemoles/gram
- 20. Multiple Choice
How many molecules are in 2.5 mol of NaCl?
15 sextillion
146
241 sextillion
1505 sextillion
- 21. Multiple Choice
How many molecules of sugar (C6H12O6) are in one mole?
24 molecules
180 molecules
180 g molecules
602 sextillion molecules
- 22. Multiple Choice
How many moles are there in 8428 sextillion molecules of sodium sulfate, Na2SO4?
1.4 moles
14 moles
51 moles
5.12 x 1048 moles
- 23. Multiple Choice
How many water molecules are in 5.2 moles of water?
602 sextillion molecules
5.2 sextillion molecules
3010 sextillion molecules
18 sextillion molecules
- 24. Multiple Choice
511 sextillion atoms of lithium (Li) is equal to how many moles?
1.18 moles
0.351 moles
1.34 moles
0.849 moles
- 25. Multiple Choice
Which has more molecules?
1 mole H2O
1 mole CH4
1 mole Cl2
They're are all the same.
- 26. Multiple Choice
0.50 moles of carbon (C) is equal to how many grams?
6.0 grams
12.0 grams
8.0 grams
14.0 grams
- 27. Multiple Choice
36.0 g of beryllium (Be) contains how many moles?
0.25 mol
4.0 mol
45 mol
320 mol
- 28. Multiple Choice
What is the mass of 15 moles of water?
0.8 g
270 g
0.8 mol
270 mol
- 29. Multiple Choice
How many moles are in 564 grams of Copper?
0.11 mol Cu
25 mol Cu
87 mol Cu
8.87 mol Cu
- 30. Multiple Choice
How many grams are in 1.2 moles of Neon?
0.05 grams
16.6 grams
21.2 grams
24 grams
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