Question

How many moles of hydrogen molecules (h2) are present in 9 x 1023 molecules of hydrogen?

Answer 1

hello

So the molar mass of a Hydrogen molecule is 2. If you have 10 grams of Hydrogen molecules, you have 5 moles of Hydrogen molecules (10 moles of Hydrogen atoms). Avogadro's number is 6.0225x10^23. This means that one mole of a substance has that many particles.

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Answer 2

1,5 moles of H₂

Step-by-step explanation:

Avogadro's number is defined as a constant that relates the number of particles presents in 1 mole. This number is 6,022x10²³.

Thus, 9x10²³ molecules of hydrogen are:

9x10²³ molecules of hydrogen × (1 mole / 6,022x10²³molecules) =

1,5 moles of H₂

I hope it helps!