How much does one hydrogen atom weigh (grams)?

Question

One cubic metre of hydrogen at normal pressure contains 26,900,000,000,000,000,000,000 molecules and weighs 0.090 kg. Each molecule contains two hydrogen atoms. How much does one hydrogen atom weigh (grams). Answer in terms of the power of one.

Answer 1

You would need to convert 1 mole of hydrogen into hydrogen atoms to find the weight of a hydrogen atom.

Using 1.008 grams/mole Hydrogen (1 mole/6.022 x 1023 atoms) = 1.67 x 10-24 grams. The mass or

weight of a hydrogen atom would be 1.68 grams (1.008 x 1.67). This calculation would need to follow the formula used to calculate the weight of a hydrogen atom in grams.

Answer 2

(9 x 10^-3) / (5.38 x 10¹³) = ?