Huang Vaughan
07/25/2023 · Primary School
Calcium carbonate has the formula \( \mathrm{CaCO}_{3} \). a What is its relative formula mass \( \left(M_{\mathrm{r}}\right) \) ? \( \left(A_{\mathrm{r}}: \mathrm{Ca}=40, \mathrm{C}=12, \mathrm{O}=16\right) \) b If 100 g of calcium carbonate contain 40 g of calcium, how much calcium is present in 15 g of calcium carbonate?
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a) The relative formula mass of \(CaCO_{3}\) is 100.
b) 6 g of calcium is present in 15 g of calcium carbonate.
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