Question

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

Answer 1

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