Question

given: 4na + o₂ → 2na₂o. in this chemical reaction, how many moles of na₂o will be produced if 2.90 moles of na react completely? express your answer to three significant figures. there will be moles of na₂o.

Explanation:

Step1: Identify mole - ratio

The balanced chemical equation is \(4Na + O_2
ightarrow2Na_2O\). The mole - ratio of \(Na\) to \(Na_2O\) is \(4:2\) or \(2:1\).

Step2: Calculate moles of \(Na_2O\)

Given \(n_{Na}=2.90\) moles. Using the mole - ratio \(\frac{n_{Na_2O}}{n_{Na}}=\frac{1}{2}\), so \(n_{Na_2O}=\frac{n_{Na}}{2}\). Substituting \(n_{Na} = 2.90\) moles, we get \(n_{Na_2O}=\frac{2.90}{2}=1.45\) moles.

Answer:

1.45