What is the mass in grams of one molecule of ethnic acid CH_3COOHCH3COOH?

1 Answer
Trevor Ryan.
Dec 16, 2015

9.96181xx10^(-23)g9.96181×10−23g

Explanation:

1 mole of the organic carboxylic acid ethanoic acid (acetic acid) has a mass equal to its molar mass M_r=12+3+12+16+16+1=60g//molMr=12+3+12+16+16+1=60g/mol.

But 1 mole contains an Avagadro number of molecules, ie N_A=6.023xx10^23NA=6.023×1023 molecules.

Therefore 1 molecule of this weak acid has a mass of 60/(6.023xx10^23)=9.96181xx10^(-23)g606.023×1023=9.96181×10−23g

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