Ancient egyptians used a variety of lead compounds as white pigments in their cosmetics, including pbs, pbco3, pbcl(oh), and pb2cl2co3. which of these compounds contains the highest percentage of lead (by mass)

Answer : The compound contains the highest percentage of lead (by mass) is, PbS.

Explanation :

To calculate the percentage of lead in sample, we use the equation:

For :

Mass of = 239.3 g

Mass of Pb = 207.2 g

Putting values in above equation, we get:

The percentage of lead in the is 86.58 %.

For :

Mass of = 267.2 g

Mass of Pb = 207.2 g

Putting values in above equation, we get:

The percentage of lead in the is 77.55 %.

For :

Mass of = 259.7 g

Mass of Pb = 207.2 g

Putting values in above equation, we get:

The percentage of lead in the is 79.78 %.

For :

Mass of = 545.3 g

Mass of Pb = 207.2 g

Putting values in above equation, we get:

The percentage of lead in the is 37.99 %.

Hence, from this we conclude that, the compound PbS contains the highest percentage of lead (by mass).