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- 1. Multiple ChoiceWhat are the units for molar mass?gramsmolesgrams/moleliters
- 2. Multiple Choice
Fluorine gas is diatomic. What is its molar mass? (recall from our class during the student strike)
18.998 g/mol
37.996 g/mol
9 g/mol
18 g/mol
- 3. Multiple ChoiceWhich compound has the smallest molar mass?COCO2H2OH2O2
- 4. Multiple ChoiceWhat is the mass of 1.8 mol of aluminum chloride?26.98 g62.43 g133.34 g240.01 g
- 5. Multiple ChoiceHow many grams are in 3.62 mol of dicarbon tetroxide?88.03.62319159
- 6. Multiple ChoiceFind the Molar Mass of:
Ga2(SO3)3280 g/mol400 g/mol380 g/mol480 g/mol - 7. Multiple ChoiceThe mole concept is important in chemistry becauseit allows us to distinguish between elements and compounds.atoms and molecules are very small and the mole concept allows us to count atoms and molecules by weighing macroscopic amounts of material.it establishes a standard for reaction stoichiometry.it provides a universally accepted standard for mass.
- 8. Multiple Choice
How much volume does 3 moles of chlorine gas occupy at STP? (hopefully you recall from your strike, 22L of gas = 1 mole of gas)
250 L
213 L
106.5 L
67.2 L
- 9. Multiple ChoiceI need 9.20 x 1018 molecules of Fe2O3 to react with 1.2mg of Al. How many mg of of Iron (III) oxide to I need?1.68 mg1.26mg2.46mg3.02mg
- 10. Multiple ChoiceWhat is the molar mass of table salt (NaCl)?116.886 g/mol35.453 g/mol22.990 g/mol58.443 g/mol
- 11. Multiple ChoiceWhat is the mass of one mole of aluminum?27 g13 g54 g14 g
- 12. Multiple ChoiceHow many particles are in a mole?602602 million602 moles6.02 x 1023
- 13. 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
- 14. Multiple ChoiceWhich would have more atoms?1 mole of Li1 mole of Au1 mole of SiNone, all are equal
- 15. Multiple Choice
The mass of one mole of an element is equal to
its atomic number from the periodic table, but in amus.
its atomic mass from the periodic table, but in amus.
its atomic mass from the periodic table, but in grams.
its atomic number from the periodic table, but in grams.
- 16. Multiple Choice
Shivani measures out 6.0 moles of epsom salt (MgSO4) to put in her bath. How many grams of MgSO4 went in the bath?
3.6 x 1024 g
720 g
0.050 g
340 g
- 17. Multiple Choice
Determine the mass of 4.20 moles of C6H12
353 g
0.0499 g
337 g
2.53 x 1024 g
- 18. Multiple ChoiceHow many molecules are there in 31.8 moles of water?5.28 x 10-23 molecules1.91 x 1025 molecules5.28x 10-251.91 x 1022
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