Question

How many moles of PbS are equivalent to 458 g PbS?

Answer 1

Moles = Mass/Molar Mass

By this formula
458/207+32 you should get your answer
The ans. is 1.916 mol to 4 sig. Fig.

Answer 2

1.914 mol

Step-by-step explanation:

Use the following convert to convert mass to moles.

Moles =
`(mass)/(molar mass)`.

Given,

Mass of PbS = 458 g

Molar mass of PbS = 239.3 g/mol

Moles of PbS =
`(Mass of PbS)/(Molar mass of PbS )`

=
`(458 g)/(239.3 g/mol )`= 1.914 mol

1.914 moles of PbS are equivalent to 458 g PbS