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- 1. Multiple Choice
(0901) Avogadro’s number is:
6.02 x 1022
6
6.02 x 1023
3.01 x 1023
- 2. Multiple Choice
(0901) Determine the number of moles in 5.2 x 1022 atoms of gold.
0.086 mole
0.52 mole
8.63 x 1044 moles
3.1 x 1046 moles
- 3. Multiple Choice
(0901) How many water molecules are in 5.2 moles of water?
6.0 x 1023 molecules
5.2 molecules
3.1 x 1024 molecules
8.6 x 10-24 molecules
- 4. Multiple Choice
(0902) The mass of one mole of substance is called...
molecular mass
mole constant
molar mass
atomic weight
- 5. Multiple Choice
(0902) What is the molar mass of Ca(NO3)2?
148.096 g
164.086 g
102.055 g
70.084 g
- 6. Multiple Choice
(0903) Determine how many grams are in 0.36 moles of CCl4.
150 g
55 g
0.0023 g
2.2 g
- 7. Multiple Choice
(0903) If you want 1.55 moles of nitrogen trichloride, how many grams should you measure out?
0.0129 g
120. g
187 g
9.33 g
- 8. Multiple Choice
(0904) How many atoms would be contained in 454 grams of iron?
6.02 x 1023 atoms
8.14 atoms
4.89 x 1024 atoms
55.9 x 1023 atoms
- 9. Multiple Choice
(0904) How many molecules are present in 25 g of O2?
32. molecules
0.78 molecules
4.7x1023 molecules
1.3 x 1023 molecules
- 10. Multiple ChoiceHow many steps are in a gram to mole conversion?1234
- 11. Multiple ChoiceWhat are the units for molar mass?gramsamugrams/moleliters
- 12. Multiple ChoiceHow many steps are in a gram to molecule conversion?1234
- 13. Multiple Choice
What would be the mass of 9.76 x 1022 formula units of SrCl2?
.1622 g
25.7 g
20.0 g
.3589 g
- 14. 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
- 15. Multiple ChoiceMole in Chemistry is a(an)_______.unitanimalnumber equals to 6.02number equals to 12
- 16. Multiple ChoiceWhy do we use moles?We want to use a lot of chemicals.We want to count chemicals using its mass.We have the technology to count atoms one by one.We like little cute animals.
- 17. Multiple ChoiceA container with a volume of 893 L contains how many moles of air at STP?20003.2 L39.9 L22.4 Lnone of the choices
- Answer choicesTagsAnswer choicesTags