Question

5. What is the mass of
a.0.2 mole of oxygen atom
b. 0.5 mole of water molecule
c. 0.5 mole of Nitrogen gas

please explain properly
and be quick​

Answer 1

Answer:

Answer is option A) 0.2 mole of oxygen atom

Explanation:

∴ 0.2 mole of oxygen atoms = 16 × 0.2 = 3.2 g

(b) 1 mole of water molecules = 18 g

∴ 0.5 mole of water molecules = 18 × 0.5 = 9 g 10.

Answer 2

Question :-

What is the mass of:

(a) 0.2 mole of oxygen atoms?

(b) 0.5 mole of water molecules?

Answer :-

(a) Mole of Oxygen atoms = 0.2 mole

Molar mass of oxygen atoms = 16 g

Mass of oxygen atoms = 16 x 0.2 = 3.2 g

(b) Mole of water molecule = 0.5 mole

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

Mass of H2O = 18 x 0.5 = 9 g

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