You have 100 g of Pb (NO3) 2. How many moles is this?

0.302 moles

Explanation:

Data given

Mass of Pb (NO₃) ₂ = 100 g

Moles of Pb (NO₃) ₂ = ?

Solution:

To find mole we have to know about molar mass of Pb (NO₃) ₂

So,

Molar mass of Pb (NO₃) ₂ = 207 + 2[14 + 3 (16) ]

= 207 + 2[14 + 48]

= 207 + 124

Molar mass of Pb (NO₃) ₂ = 331 g/mol

Formula used:

no. of moles = mass in grams / molar mass

Put values in above formula

no. of moles = 100 g / 331 g/mol

no. of moles = 0.302 moles

no. of moles of Pb (NO₃) ₂ = 0.302 moles