The measured density oe He at NTP is 0.1784g/l.what is the weight of one mole?

3 answers

Huh ?
do you mean

The measured density of He at STP is 0.1784g/l.what is the weight of one mole?

If so
then
1 mole = 22.4 liters at STP
22.4 * .1784 = answer
3.99
V=nRT/p
22.7ltr.