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

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 =  

initial number of moles = 101.8 moles

and

final number of moles is =  

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

answer; ///i believe the correct answer is (b) the writing of the ancients who lived in india after the indus valley inhabitants died out;