00:01
This question they have asked that what is the molar mass of a substance? molar mass of a substance okay they have given the options so first of all i want to explain you what is meant by molar mass coming to the molar mass definition that means molar mass so it is nothing but mass mass mass of a substance molar mass it is mass of a substance that is mass in grams mass in grams of one mole of substance one mole of substance so mass in grams of one molar of substance it is nothing but the molar mass mathematically molar mass it is expressed by means of molar mass is a two.
00:51
So mass in grams, mass in grams divided by moles of substance, moles of substance, for example, molar mass of, for example, molar mass of one mole of methane molecule.
01:09
It can be calculated as molar mass of methane, molar mass of methane.
01:15
So mass of carbon atom, mass of carbon atom plus, so mass of carbon atom plus, so only one carbon atom.
01:30
How many hydrogen atoms? 4 into, 4 into mass of hydrogen.
01:35
So that is mass of 1 carbon atom 2 1, 4 into mass of 1 hydrogen, hydrogen...