SOME BASIC CONCEPTS OF
CHEMISTRY
CLASS
XI
MOST IMPORTANT
FORMULAE
, Relation between mass and
moles
w=given mass of
n=w/M
substance
No.of moles
M=Molar mass
Example:Find the molar mass if weight of the substance is 80g
and n=5mol
of a given Ans:n=5
substance w=80
M=w/n
M=80/5
M=16g/mol
CHEMISTRY
CLASS
XI
MOST IMPORTANT
FORMULAE
, Relation between mass and
moles
w=given mass of
n=w/M
substance
No.of moles
M=Molar mass
Example:Find the molar mass if weight of the substance is 80g
and n=5mol
of a given Ans:n=5
substance w=80
M=w/n
M=80/5
M=16g/mol