You have 25ml of acetic acid (CH3COOH) density=1.058g/ml How many grams do you have? How many mol do you have? How many molecules do you have? Help please

1 Answer
Feb 15, 2018

see below

Explanation:

we know,volume #xx#density=mass
thus,given mass of#CH_3COOH#=25#xx#1.058 OR 26.45 gm.
But molar mass of acetic acid=60 gm
Thus,the required number of moles,=#(given mass)//(molar mass)# which comes out to be #color(red)(approx 0.441)# no. of moles
1 mole has #6.022 xx 10^23# molecules.
thus 0.441 moles have #0.441 xx6.022xx10^23# molecules which is #color(red)(approx 2.658 xx10^23)# number of molecules