# How to solve the questions of moles in chemistry?

2
by Rajanverma

2014-02-23T12:38:11+05:30
First you need to balance any equation given. then you need to figure the mole ratios.say 2 moles of iron (II) sulfide form 1 mole of iron (II) chloride, then it is a 2 to 1 ratio, then you say you have~ 1 mole of iron sulfide X 2 moles of iron chloride/1mole of iron sulfide X of iron sulfide/1 mole of iron sulfide. Just make sure to start with a balanced equation.

there is a formula which is importent : (n) moles = (m) mass / (M)molar mass
Thanks bro
Avogadros number is the number of molecules in one mole. You would use Avagadros number for calculating a mass if you new you had a mole of something (that means Avagadros number of different particles) and you knew the mass of those particles. The avogrado number is 6.0221415×10^23.
Ok I got it.
Sir the answer given by her is different
Thanx sir
2014-02-23T12:38:52+05:30
USE THE AVAGARDO NUMBER 6.022 * 10(23)
Nothing but I'm smart.
Just kidding.
Just kidding.....
ya u r :P
finally you accepted the truth