Question

Calculate number of moles in vessel containing 10 raised to 21 molecules of SO4

Answer 1

Num of moles =given mass divided by atomic mass ..
Basicaly it is a formula which we use to calculate the moles of given substance wherease moles also helps in several methods wherease we use it in mass to mass mass to volume nd so on....
Ans is 0.0687 or may be o.13125 actually em cofused coz there is 2 values r give one is 10 nd sec is 21 then which would be taken 1st one or last ..or may be can be minus 1st from last then we calculate ...