Question

The percentage of Ca in Caco, is
a). 12%
b). 100%
c).48%
d) 40%​

Answer 1

12% == 12/100 = 8/4
100% 100 = 100
48% 100 = 9/4
40% = 100 = 4/10

Answer 2

Answer:

In this question it's Caco3 (calcium carbonate) not Caco.

Here is your answer.....

The percentage of Ca in Caco3 is 40%

Explanation:

Mass of calcium =40g

Mass of carbon = 12g

Mass of oxygen = 16g

Mass of one mole of pure calcium carbonate (CaCO3)

= Mass of calcium + Mass of carbon + Mass of oxygen

= (40 x 1)g + (12 x 1)g + (16 x 3)g

= (40 + 12 + 48)g

= 100 g

%of Ca in CaCo3= 40×100 =40%

100

Hope it helps! ! !