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The molecular weight of calcium carbonate CaCO 3 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

 

Grade:12th pass

2 Answers

Vikas TU
14149 Points
9 months ago
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
askIITians Faculty 158 Points
9 months ago

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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