Question

(b) The mass of an atom of oxygen is 160 u.
Express it in kg
(ii) The mass of a molecule of hydrogen is
3-332 10-27 kg. Find the mass of 1 kg mol
of hydrogen gas.​

Answer 1

Answer:

i. The mass of 160 u of oxygen is 6.47 kg.

ii. 2kg

Explanation:

Mass of the molecule of hydrogen atom is= 3.332×10⁻²⁷ kg

We know that, 1 kg mol of hydrogen gas = 6.02×10²⁶ molecules of hydrogen.

∴ The mass of 1 kg mol of hydrogen gas

=(6.02×10²⁶)×3.332×10⁻²⁷ kg

= 2 kg

[∵1 mol of hydrogen weighs 2 gram.]

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Answer 2

Answer:

6.47 kg

2kg

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