Grade 12th passPhysical Chemistry
The molecular weight of calcium carbonate CaCO3 is:(A) 80
(B) 90
(C) 100
(D) 110
The molecular weight of calcium carbonate CaCO3
is:
(A) 80
(B) 90
(C) 100
(D) 110
3 Answers
Vikas TU
Dear student
Molecular weight of Ca = 40
Molecular weight of C = 12
Molecular weight of O = 16
Molrcular weight of CaCO 3 = 100 g/mol
Vikas Amritiya
Molecular weight is the mass of whole molecule.
Steps:- (1) Chemical formula of calcium carbonate ⟶CaCO3
(2) Mass of Calcium⟶40
Mass of Carbon⟶12
Mass of Oxygen⟶16
(3) Multiply mass of each element by number of atoms of that element.
(4) Add all the masses obtained after multiplication.
⟶CaCO3
=1×40+1×12+3×16
=40+12+48
=100.
irshad hussain
Correct option is
C
100
Molecular weight is the mass of whole molecule.
Steps:- (1) Chemical formula of calcium carbonate ⟶CaCO3
(2) Mass of Calcium⟶40
Mass of Carbon⟶12
Mass of Oxygen⟶16
(3) Multiply mass of each element by number of atoms of that element.
(4) Add all the masses obtained after multiplication.
⟶CaCO3
=1×40+1×12+3×16
=40+12+48
=100.
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