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7.1 - Mole and Mass Part 1

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✅EvaluateQuestion 1 of 21

What is the value of the Avogadro constant?

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✅EvaluateQuestion 2 of 21

What is the unit of molar mass?

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✅EvaluateQuestion 3 of 21

The mass of one mole of oxygen gas (O₂) is:

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✅EvaluateQuestion 4 of 21

What does one mole of sodium chloride contain?

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✅EvaluateQuestion 5 of 21

What is the formula for calculating moles?

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✅EvaluateQuestion 6 of 21

The molar mass of water (H₂O) is:

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✅EvaluateQuestion 7 of 21

How many moles are in 24 g of carbon (Ar = 12)?

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✅EvaluateQuestion 8 of 21

How many particles are there in 2 moles of carbon dioxide molecules?

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✅EvaluateQuestion 9 of 21

If 18 g of water contains 1 mole, how many grams are in 0.5 mole of water?

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✅EvaluateQuestion 10 of 21

What is the molar mass of calcium carbonate (CaCO₃)?

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✅EvaluateQuestion 11 of 21

Calculate the number of moles in 4 g of hydrogen gas (H₂).

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✅EvaluateQuestion 12 of 21

Which statement about the mole is TRUE?

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✅EvaluateQuestion 13 of 21

What is the mass of 0.2 mol of sodium chloride (NaCl, M = 58.5 g/mol)?

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✅EvaluateQuestion 14 of 21

What number of oxygen molecules are in 0.25 mol of O₂?

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✅EvaluateQuestion 15 of 21

12 g of magnesium reacts completely with oxygen to form magnesium oxide. How many moles of magnesium reacted? (Ar = 24)

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✅EvaluateQuestion 16 of 21

What is the mass of 0.1 mol of calcium carbonate (CaCO₃, M = 100 g/mol)?

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✅EvaluateQuestion 17 of 21

If 0.5 mol of CO₂ has a mass of 22 g, what is the molar mass of CO₂?

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✅EvaluateQuestion 18 of 21

What is the number of oxygen atoms in 2 moles of H₂O?

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✅EvaluateQuestion 19 of 21

A student finds 0.25 mol of calcium (Ar = 40). What is its mass?

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✅EvaluateQuestion 20 of 21

Which of the following contains the same number of molecules as 36 g of water (H₂O)?

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✅EvaluateQuestion 21 of 21

How many grams of CO₂ are present in 3 moles? (M = 44 g/mol)

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✅EvaluateQuestion 1 of 21

What is the value of the Avogadro constant?

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