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- 1. Multiple ChoiceWhich of the following would have more mass?1 mole of Li1 mole of Au1 mole of SiNone, all are equal
- 2. Multiple Choice
How many molecules are there in 31.8 moles of water? (H2O has a molar mass of 18.0 g/mol)
572 g
1.91 x 1025 molecules
5.28x 10-25 molecules
1.77 g
- 3. Multiple Choice
Vitamin C, also known as ascorbic acid, is water soluble and cannot be produced by the human body. Each day, a person's diet should include a source of Vitamin C, such as orange juice. Ascorbic acid has a molecular formula of C6H8O6 and a molar mass of 176 grams per mole.
Determine the number of moles of vitamin C in an orange that contains 0.171 grams of vitamin C.
30.1 moles
1030 moles
.000971 moles
.0001 mole
- 4. Multiple Choice
Calculate the number of moles of chlorine atoms in 55g of copper (II) chloride.
0.41 moles
0.82 moles
1.6 moles
.20 moles
- 5. Multiple Choice
What is the mass of 0.75 moles of (NH4)3PO4?
0.0044 g
91 g
110 g
74 g
- 6. Multiple ChoiceWhich has more molecules?1 mole H2O1 mole Al(OH)31 mole NaClThere are all the same
- 7. Multiple Choice
How many molecules are present in 135 g of Teflon C2F4
6.13 x 1023 molecules
5.13 x 1023 molecules
8.13 x 10 23 molecules
9.13 x 1023 molecules
- 8. Multiple ChoiceWhich of the following would have the highest number of moles?4g CO215g H2O22g NaCl100g AgCl
- 9. Multiple ChoiceCalculate the % composition by mass of oxygen present in H2SO4.16.3%65.25%32.6%57.14%
- 10. Multiple Choice
What is the molar mass of calcium hydroxide, Ca(OH)2?
74.1 g/mole
57.1 g/mole
58.1 g/mole
57.1 u
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