Answer:
1. 10.8%
2. 73.2%
Step-by-step explanation:
Sample: 1,250 grams of vanadinite (Pb₅ (VO₄)₃Cl
Mass of Vanadium = 135 g
Mass of Pb = 915 g
Percentage of V = ?
Percentage of Pb =?
Using the formula;
The percentage composition is given by the formula;
= ( mass in grams of element / mass in grams of sample) × 100
Therefore;
The percentage of Vanadium;
= (mass of V / mass of sample) × 100 = (135 g/ 1,250 g) × 100
= 10.8 %
The percentage composition of Lead;
= (mass of Pb / mass of sample) × 100 = (915 g / 1,250 g) × 100
= 73.2%