Question

Calculate no. of S02 molecule in 4.8g of it

Answer 1

no of moles = mass ÷molar mass
no . of moles =4.8÷64
number of moles = 0.075 moles (molar mass of SOy =32+16×2 =64)
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Answer 2

HEY MATE HERE'S YOUR ANSWER. ....
$molar \: masses \\ s = 32u \: \: \: \\ o = 16 \times 2 = 32u \\ so \: complete \: molar \: mass \: = 32 + 32 \\ = 64 \\ \\ given \: mass \: = 4.8g \\ number \: of \: moles \: = \frac{given \: mass}{molar \: mass} \\ = \frac{4.8}{64} = \frac{3}{40} \\ hence \: number \: of \: molecules \: = number \: of \: moles \times \: avogadro \: number \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \frac{3}{40} \times 6.023 \times {10}^{ - 23} \\ 4.517 \times {10}^{ - 24}$
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