Question

Helium is used to inflate a weather balloon from an initial volume of 2,280L to a final volume of 5,710L under constant temperature and pressure. The final volume contains 255 mol of helium. How many moles of helium were added to the balloon

Answer 1

Answer:

number of moles of He added = 153.2 moles

Explanation:

given data

initial volume = 2,280 L

final volume = 5,710 L

final volume of helium = 255 mol

solution

we get here initial number of moles of He that is

initial number of moles = $\frac{2280}{22.4}$  

initial number of moles = 101.8 moles

and

final number of moles is = $\frac{5710}{224}$  

final number of moles = 255 moles

so that number of moles of He added is

number of moles of He added = 255 - 101.8

number of moles of He added = 153.2 moles