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Sagot :
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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