Question

How many moles of oxygen are required to react with 10.0 moles of sodium

Answer 1

2.5 moles of oxygen are required

Answer:

solution given:

the reaction is:

$4Na +O_2\rightarrow2 Na_2O$

it shows that

4 moles of sodium reacts with 1 mole of oxygen to produce 2 mole of sodium oxide.

so

10 moles of sodium reacts with $\frac{1}{4}*10=\frac{5}{2}=2.5$ moles oxygen to produce $\frac{2}{4}*10=5$ mole of sodium oxide.