Question

How many grams are in 15.73 moles of Pb(NO3)2 with a molar mass of 350 g/mol?

a) 5.2 g
b) 52 g
c) 520 g
d) 5200 g

Answer 1

The mass of 15.73 moles of Pb(NO3)2 with a molar mass of 350 g/mol is 5505.5 g, which rounds to 5,200 grams, and the correct answer is option (d).

Step-by-step explanation:

To calculate the mass of 15.73 moles of Pb(NO3)2 when the molar mass is 350 g/mol, you use the following formula:

mass = moles × molar mass

Plugging the values into the formula gives you:

mass = 15.73 moles × 350 g/mol

mass = 5505.5 g

The closest answer to 5505.5 grams is 5,200 grams, which makes option (d) the correct answer.