Question

How many moles of H2O are needed to react with a mole of 3.0 of Na?​

Answer 1

Answer: 3.0 moles of water $(H_2O)$  are needed to react with a mole of 3.0 of Na

Explanation:

The balanced chemical reaction of sodium with water is as follows:

$2Na+2H_2O\rightarrow 2NaOH+H_2$

According to stoichiometry:

2 moles of sodium $(Na)$ reacts with = 2 moles of water $(H_2O)$

Thus 3.0 moles of sodium $(Na)$ reacts with = $\frac{2}{2}\times 3.0=3.0$ moles of water $(H_2O)$

3.0 moles of water $(H_2O)$  are needed to react with a mole of 3.0 of Na