Question

Percentage of calcium in 80g of CaCO3

Answer 1

Answer:

40.04

Explanation:

You take the atomic mass of calcium over the atomic mass of

C

a

C

O

3

and multiply it by 100 to get the percentage.

The mass of

C

a

is 40.078 g; the mass of

C

is 12.01 g, and the mass of

3

O

is 47.997 g (

15.999 g

×

3

).

Add all the masses together to get a total mass of 100.085 g.

So,

40.078 g

100.085 g

=

0.4004 or 40.04 %

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