Answer: The number of moles of laundry detergent used is, 2.83 moles.
Explanation : Given,
Mass of [tex]Na_2CO_3[/tex] = 300 g
Molar mass of [tex]Na_2CO_3[/tex] = 106 g/mol
Formula used :
[tex]\text{Moles of }Na_2CO_3=\frac{\text{Given mass }Na_2CO_3}{\text{Molar mass }Na_2CO_3}[/tex]
Now put all the given values in this formula, we get:
[tex]\text{Moles of }Na_2CO_3=\frac{300g}{106g/mol}[/tex]
[tex]\text{Moles of }Na_2CO_3=2.83mol[/tex]
Therefore, the number of moles of laundry detergent used is, 2.83 moles.
