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- 1. Multiple ChoiceWhich of the following does not exist in nature as a diatomic molecule?fluorinehydrogennitrogenphosphorus
- 2. Multiple Choice
When a question is referring to hydrogen gas, what formula is it referring to?
H
H+1
H2
H-1
- 3. Multiple ChoiceIn 5.00 moles of sodium sulfate, what is the total number of moles of sodium present?1.002.005.0010.00
- 4. Multiple Choice
What ion would you expect P to form during the formation of an ionic compound? 1 mol of P would lose or gain how many moles of electrons in this process?
P3+; lose moles 3 electrons
P5+; gain 5 moles electrons
P3−; gain 3 moles electrons
P5−; lose 5 moles electrons
- 5. Multiple Choice
What is the molar mass of silver carbonate?
167.9 g/mol
227.8 g/mol
Unable to determine without Roman numeral
275.7 g/mol
- 6. Multiple ChoiceWhat is the formula mass of nitrogen dioxide?44.0 amu46.0 amu30.0 amu14.0 amu
- 7. Multiple ChoiceWhat is the molar mass of iron(II) sulfate?207.756 g/mol199.651 g/mol151.908 g/mol303.816 g/mol
- 8. Multiple ChoiceWhich one has the greatest number of atoms?3.05 moles of He3.05 moles of CH43.05 moles of H2O3.05 moles of Ar
- 9. Multiple Choice
1.0 mol of sodium phosphate, Na3(PO4) contains how many total moles of ions?
1.0 moles of ions
4.0 moles of ions
8.0 moles of ions
2.0 moles of ions
- 10. Multiple Choice
Organize the following in order of increasing numbers of moles:
I. 5.00 grams of calcium (Ca)
II. 5.00 grams of neon (Ne)
III. 5.00 grams of lithium (Li)
I < III < II
I = II = III
III < II < I
I < II < III
- 11. Multiple Choice
What is the mass of 2.408x1024 molecules of fluorine gas?
152.0 g of fluorine gas
76.00 g of fluorine gas
304.0 g of fluorine gas
38.00g of fluorine gas
- 12. Multiple ChoiceHow many electrons are in 1 mole of carbon atoms?612 × (6.02 × 1023)126 × (6.02 × 1023)
- 13. Multiple ChoiceHow many oxygen atoms (not molecules) are present in 1.25 moles of SO2?2.50 atoms1.25 atoms7.52 × 1023 atoms1.50 × 1024 atoms
- 14. Multiple ChoiceHow many moles of carbon atoms are in 5 moles of glucose (C6H12O6)?1 mol5 mol20 mol30 mol
- 15. Multiple ChoiceHow many moles of the element oxygen are in 4.00 moles of the compound K2Cr2O7?28.0 mol4.00 mol1.00 mol7.00 mol
- 16. Multiple Choice
If a can of soda contains 3.01x1023 molecules of caffeine, how many moles of caffeine are in the soda?
0.500 mol
0.250 mol
0.750 mol
1.00 mol
- 17. Multiple ChoiceHow many moles of Fe are combined with 3.61×1024 atoms of O in Fe2O3?6.00 mol4.00 mol2.00 mol0.667 mol
- 18. Multiple ChoiceHow many sodium ions are in 1.4 kg of sodium chloride?1.4 × 1022 ions2.8 x 1022 ions1.4 × 1025 ions2.8 x 1025 ions
- 19. Multiple Choice
In 1950, the average volume of mercury in a thermometer was 1.9mL. Using the average atomic mass, calculate the number of atoms of mercury present in an average mercury thermometer in 1950. (Density = 13.6 g/mL)
7.8 × 1022 atoms
2.1 × 1022 atoms
7.8 × 1025 atoms
2.1 × 1025 atoms
- 20. Multiple Choice
A chemist measured out 22.3 g of copper(II) bromide, CuBr2.
How many formula units of copper(II) bromide were measured out?
6.02x1024 formula units of CuBr2
6.02x1025 formula units of CuBr2
6.02x1023 formula units of CuBr2
6.02x1022 formula units of CuBr2
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