Answer : The mass percent of [tex]NaHCO_3[/tex] in the sample is, 65.7 %
Explanation :
As we are given that Na makes up 18.00% of the entire mass of the sample.
First we have to calculate the mass percent of Na in [tex]NaHCO_3[/tex].
[tex]\text{Mass percent of Na}=\frac{\text{Mass of Na}}{\text{Mass of }NaHCO_3}\times 100[/tex]
Mass of Na = 23 g
Mass of [tex]NaHCO_3[/tex] = 84 g
Putting values in above equation, we get:
[tex]\text{Mass percent of Na}=\frac{23g}{84g}\times 100=27.4\%[/tex]
Now we have to calculate the mass percent of [tex]NaHCO_3[/tex] in the sample.
As, 27.4 % amount of Na present in 100 % [tex]NaHCO_3[/tex]
So, 18 % amount of Na present in [tex]\frac{18}{27.4}\times 100\%=65.7\%[/tex] [tex]NaHCO_3[/tex]
Therefore, the mass percent of [tex]NaHCO_3[/tex] in the sample is, 65.7 %
