Question

Hello friends
What is mass of:
a) 0•2 mole of oxygen atoms?
b) 0•5 mole of water molecules?

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Answer 1

Answer:

Oxygen's atomic weight is 16.00 amu. 1 mole of oxygen is 6.02 x 1023 atoms of oxygen 1 amu = 1.661 x 10-24g What is the molar mass (g/mole) of oxygen? Molar mass (in grams) is always equal to the atomic weight of the atom! Molar mass (in grams) is always equal to the atomic weight of the atom!

Explanation:

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Answer 2

Explanation:

a) 0•2 mole of oxygen atims?

A) Mole of oxygen atoms = 0•2 mole

Molar mass of oxygen atoms = 16 g

Mass of oxygen atoms = 16×0•2 = 3•2 g

b) 0•5 mole of water molecules?

A) Mole of water mloecule = 0•5 mole

Molar mass of water molecules = 2×1+16= 18 g

Mass of H2O = 18×0•5 = 9 g.

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