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What is the mass of 1 mol of oxygen gas (O?)?

8 g
32 g
16 g
28 g

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

How many grams are there in 0.5 mol of NaCl? (Na = 23, Cl = 35.5)

29.25 g
58.5 g
17.75 g
50.5 g

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

2 moles of CaCO? decompose to give: (CaCO? ? CaO + CO?)

2 mol CaO and 2 mol CO?
1 mol CaO and 1 mol CO?
2 mol CaO and 1 mol CO?
1 mol CaO and 2 mol CO?

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

The molar volume of a gas at STP is:

22.4 L
24.5 L
1 mole

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

How many moles of O? are needed to completely burn 1 mol of propane? (C?H? + 5O? ? 3CO? + 4H?O)

5
3
4
2

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

For the reaction 2H? + O? ? 2H?O, what mass of water is formed from 4 g H??

36 g
72 g
18 g
9 g

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

9 g
18 g
4.5 g
6 g

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

In 4 moles of SO?, how many oxygen atoms are present?

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

1 mol of NaCl contains how many ions in solution?

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

At STP, 2 moles of O? occupy:

44.8 L
22.4 L
11.2 L
33.6 L

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

How many atoms are present in 3 mol of Al?

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

Avogadro?s number refers to:

Particles in 1 g
Atoms in 1 mole
Moles in 1 gram
Atoms in 1 liter

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

In the reaction 2Na + Cl? ? 2NaCl, how many moles of Na are needed for 1 mol Cl??

1
2
0.5
3

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

How many grams of CO? are formed from 2 mol of C? (C + O? ? CO?)

22 g
44 g
88 g
66 g

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

1 mole of H?O contains:

18 g
All of these

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

What volume of CO? is produced by complete combustion of 2 mol C?H?? (2C?H? + 7O? ? 4CO? + 6H?O)

22.4 L
44.8 L
89.6 L
112 L

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

What mass of H? is needed to produce 36 g of H?O? (2H? + O? ? 2H?O)

2 g
4 g
6 g
8 g

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

How many molecules are there in 0.5 mol of CO??

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

In the reaction N? + 3H? ? 2NH?, how many moles of NH? are produced from 6 moles of H??

2
4
6
3

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FUNDAMENTAL CONCEPTS OF CHEMISTRY

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