What mass of hydrochloric acid is needed to decompose 50 g of limestone?

Options

A. 36.5 g
B. 73 g
C. 50 g
D. 100 g

Explanation

To determine the mass of hydrochloric acid (HCl) needed to decompose 50 g of limestone (CaCO3), we can follow these steps:

### Step 1: Write the balanced chemical equation
The reaction between limestone (CaCO3) and hydrochloric acid (HCl) can be represented as follows:

\[ \text{CaCO}_3 + 2 \text{HCl} \rightarrow \text{CaCl}_2 + \text{H}_2\text{O} + \text{CO}_2 \]

This equation shows that 1 mole of CaCO3 reacts with 2 moles of HCl.
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