........CHEMISTRY hELP .....?

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........CHEMISTRY hELP .....?

How many moles are in 3 kg of ethanol?

2007-01-19 05:15:59 · 3 answers · asked by MEB 2 in Science & Mathematics ➔ Chemistry

3 answers

First calculate the molecular weight of ethanol from its formula. Then divide the mass by the molecular weight, and you'll calculate the number of moles.

2007-01-19 05:18:27 · answer #1 · answered by hcbiochem 7 · 0⤊ 0⤋

3.0 Kg*(1000 g/1Kg)*(1 mol/46 g)= 65.217 mol
46 is Molecular weight of ethanol

2007-01-19 13:39:26 · answer #2 · answered by Quimico31 3 · 0⤊ 0⤋

3kg= 3000g
Ethanol =CH3CH2OH
Molar mass of ethanol=12.01+3*1.01+12.01+2*1.01+16.00+1.1
Molar mass of ethanol=46.07g/mol
n=m/M
n=3000g/46.07g/mol
n=65.12mol

2007-01-19 13:28:16 · answer #3 · answered by Anonymous · 0⤊ 0⤋