Question

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.

Answer 1

The balanced chemical equation representing the reaction of sodium metal with oxygen gas is,

$4 Na (s) + O_{2}-->2Na_{2}O(s)$

4 mol Na require 1 mol O2 for complete reaction to form 2 mol Na2O

Given the moles of Na reacting = 2.90 mol Na

2 mol $Na_{2}O$ can form from 4 mol Na as per the balanced chemical equation.

Calculating the moles of $Na_{2}O$ that can be formed from 2.90 mol Na:

$2.90 mol Na * \frac{2 mol Na_{2}O }{4 mol Na} = 1.45 mol Na_{2}O$

Therefore, 1.45 mol $Na_{2}O$ can form from 2.90 mol Na.