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Answer :

Answer:

there are 310.64 grams in 9.40×10²⁵ molecules of H₂.

Explanation:

Amount of moles of H₂= (9.6 × 10²⁵ atoms × 1 mole) ÷ 6.023 × 10²³ atoms

amount of moles of H₂ = 155.32 moles

On the other hand, molar mass is the amount of mass that a substance contains in one mole. In this case, the molar mass of H₂ is 2 .

Then the mass that 155.32 mole of compound contains is calculated as:

155.32 moles × 2 = 310.64 grams

Finally, there are 310.64 grams in 9.40×10²⁵ molecules of H₂.

Moles of H_2

[tex]\\ \rm\Rrightarrow \dfrac{No\:of\: molecules}{Avagadro\:no}[/tex]

[tex]\\ \rm\Rrightarrow \dfrac{9.6\times 10^{25}}{6.023\times 10^{23}}[/tex]

[tex]\\ \rm\Rrightarrow 1.594\times 10^{2}[/tex]

[tex]\\ \rm\Rrightarrow 159.39mol[/tex]

Mass

[tex]\\ \rm\Rrightarrow Moles\times molar\:mass[/tex]

[tex]\\ \rm\Rrightarrow 159.39(2)[/tex]

[tex]\\ \rm\Rrightarrow 318.78g[/tex]

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