Question

consider reaction: Na(s) + O2(g) Na2O. Moles of the oxygen needed to balance equation are:
a. 1
b.2
c.3
d.4​

Answer 1

Answer:

2

Explanation:

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Answer 2

1 mole of the oxygen needed to balance equation.

The correct option is a.

• The given reaction is $Na(s) +O_2(g) \rightarrow Na_2O$
• To balance the given reaction we have to add 4 moles of Na and 1 mole of oxygen which result 2 mol of sodium oxide.
• The balanced reaction is-

$4Na(s) +O_2(g) \rightarrow 2Na_2O$

• So, 1 mole oxygen is needed.