Question

What is the mass of 3*10^10molecules of ethanoic acid

Answer 1

Dear student,

The mass of 6.022 $\times {10}^{23}$ molecules of ethanoic acid = 60 g/ mole
The mass of 1 molecule of ethanoic acid = $\frac{60}{6.022\times {10}^{23}}$
The mass of $3\times {10}^{10}$ molecules of ethanoic acid = $\frac{60\times 3\times {10}^{10}}{6.022\times {10}^{23}}$
= $28.89\times 10{}^{13}$ g

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