Question

What is correct for 10 g of $CaC{O}_3$ ?

• A. It contains 1 g atom of carbon
• B. It contains 0.3 g atoms of oxygen
• C. It contains 12 g of calcium
• D. It refers to 0.1 g-equivalent of $CaC{O}_3$

Answer 1

Answer: (B)

$10g$ of $CaC{O}_3=\frac{10}{100}$
$=0.1g$ mol of $CaC{O}_3$
$=0\cdot 1\times 3$ g-atom of oxygen
$=0\cdot 3g$ atoms of oxygen