28. How much calcium is present in 0.1g of CaCO3?
a. 0.01g
b. 0.02g
C. 0.03g
d. 0.04g
Answers
Answer:
Start with the equation:
Ca + CO3 → CaCO3
As you can see the ratio is 1:1:1. Then enter their atomic masses, to calculate the ratio between the masses. After which they can be used to calcuate the weight you want to know.
Atomic masses:
40,08 Ca + 60,01 CO3 → 100,09 CaCO3
Weight Ratio:
4 Ca + 6 CO3 → 10 CaCO3
So:
0.1 gram / 10 x 4 = 0,04 gram Calcium
Option D
Explanation:
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Explanation:
How much calcium is present in 0.1g of CaCO3?
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Start with the equation:
Ca + CO3 → CaCO3
As you can see the ratio is 1:1:1. Then enter their atomic masses, to calculate the ratio between the masses. After which they can be used to calcuate the weight you want to know.
Atomic masses:
40,08 Ca + 60,01 CO3 → 100,09 CaCO3
Weight Ratio:
4 Ca + 6 CO3 → 10 CaCO3
So:
0.1 gram / 10 x 4 = 0,04 gram Calcium