Chemistry: Calculate the percentage by mass of lead in pbco3. a.17.96 b.22.46 c.73.05 d.77.54 e.89.22

The pH of this solution is 3.4....

Calculate the percentage by mass of lead in pbco3.

Theresab2021

14.03.2022

The correct answer is d.

Explanation:

Step 1: First we must obtain the molecular weight of $PbCO_{3}$ and Pb.

$PM_{PbCO_{3} }$ = 267,21 $\frac{g}{mol}$

$PM_{Pb}$ = 207,2 $\frac{g}{mol}$

Step 2: We can now calculate the percentage of lead in a $PbCO_{3}$ molecule by stating a simple rule of three:

$PM_{PbCO_{3} }$ --> 100%.

$PM_{Pb}$ --> X

%Pb = $\frac{PM_{Pb}}{ PM_{PbCO_{3} }} * 100%$

%Pb = $\frac{207.2 \frac{g}{mol}}{267.21 \frac{g}{mol}} * 100%$

%Pb = 77,54 %

Have a nice day!

0,0(0 оценок)