The mole & Avogadro's constant questions

Assignment: Questions on The mole & Avogadro's constant

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1

Deduce the total number of atoms and molecules in:   

i. one molecule of methane.

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ii.  one mole of methane.

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iii. 1.605 g of methane.

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2

What is the mass of:

i. One mole of sodium chloride, NaCl?

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ii.  2.00 x 10-2 mol of glucose, C6H12O6?

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iii.  3.62 mol of magnesium oxide, MgO?

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3

What is the mass of:

i. 6.02 x 1023 atoms of sulfur, S?

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ii. 3.01 x 1022 iron(II) ions, Fe2+?

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iii. 1.204 x 1024 molecules of water, H2O?

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4

What amount (in mol) is present in:

i. 100 g of calcium carbonate, CaCO3?

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ii. 132 g of carbon dioxide, CO2?

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iii. 2.497 g of copper(II) sulfate pentahydrate, CuSO4.5H2O?

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5

How many atoms are present in:

i. 6.41 g of sulfur dioxide, SO2?

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ii. 262.6 g of xenon, Xe?

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iii. 3.603 g of aspirin, C9H8O4?

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6

Deduce the number of nitrogen atoms in:

i. 5.00 x 10-3 mol of ammonia, NH3.

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ii. 14.01 g of nitrogen gas, N2.

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iii. 4.601 g of nitrogen dioxide, NO2.

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