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- 1. Multiple ChoiceHow many moles are 98.3 grams of aluminum hydroxide, Al(OH)3?1.26 moles0.8 moles7,673.4 moles150 moles
- 2. Multiple Choice
Convert 25 g of NaBr to molecules
102.96 molecules
0.24 molecules
1.45x1023 molecules
2.34 x 1020molecules
- 3. Multiple Choice
What is the molar mass of NaCl?
58.45g/mol
28g/mol
12g/mol
6.02 x 1023
- 4. Multiple Choice
Which of the following statement are true about the formula of dinitrogen monoxide, N2O?
The relative molecular mass is 28.
One molecule of N2O consists of one nitrogen atom and one oxygen atom.
One mole of N2O contains 6.02 x 1023 atoms of nitrogen.
One mole of N2O consists of two mole of nitrogen atom and one mole of oxygen atom.
- 5. Multiple Choice
Identify the number of Chlorine atoms in 65.8 g CaCl2.
7.14 x 1023 atoms
8.71 x 1023 atoms
1.22 x 1023 atoms
3.57 x 1023 atoms
- 6. Multiple Choice
Determine the number of moles of Na2CrO4 that contain 4.33 x 1024 oxygen atoms.
7.19 mol
6.77 mol
1.80 mol
64.00 mol
- 7. Multiple ChoiceWhich has more molecules?1 mole H2O1 mole Al(OH)31 mole NaClThere are all the same
- 8. Multiple ChoiceWhat is the molar mass of one molecule of Nitrogen N2?14.01 amu14.01 g28.02 g28.02 amu
- 9. Multiple ChoiceFind the Molar Mass of:
Ga2(SO3)3280 g/mol400 g/mol380 g/mol480 g/mol - 10. Multiple Choice
88.0 grams of CO2 is about _____________. [Select 3 answers.]
1 mole of CO2
2 moles of CO2
6.02 x 1023 molecules of CO2
two times 6.02 x 1023 molecules of CO2
2 moles of carbon atoms and 4 moles of oxygen atoms
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