Question

How many molecules of sodium oxide will be created if 275 grams of sodium reacts with excess oxygen?

Answer 1

3.6 x 10²⁴molecules

Explanation:

Given parameters:

Mass of Na = 275g

Unknown:

Number of molecules of Na₂O =  

Solution:

Since sodium is the limiting reactant, we first use it to find the number of mole of the Na₂O  and transpose it into finding the number of molecules.

  Given equation:

                     4Na  + O₂  →   2Na₂O

Since the equation is balanced, let us find the number of moles of Na;

 Number of moles = $\frac{mass}{molar mass}$  = $\frac{275}{23}$ = 11.96moles

From the equation of the reaction;

    4 mole of Na produced  2 moles of Na₂O

   11.96 moles of Na will produce $\frac{11.96 x 2}{4}$  = 6moles

1 mole of a substance = 6.02 x 10²³ molecules

 6 moles of Na₂O = 6 x 6.02 x 10²³ molecules = 3.6 x 10²⁴molecules

learn more:

Number of moles brainly.com/question/1841136

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