A sample of helium has a volume of 150.0 L at STP. How many moles of helium are in the container?

The answer to your question is  n = 6.24 moles

Explanation:

Data

Volume = 150 l

moles = ?

Temperature = 20°C

Pressure = 1 atm

R = 0.082 atm L / mol°K

Process

1.- Convert temperature to °K

T = 20 + 273 = 293°K

2.- Use the formula of ideal gases

Formula

             PV = nRT

-Solve for n

             n = PV/RT

-Substitution

             n = (1)(150) / (0.082)(293)

-Simplification

             n = 150 / 24.026

-Result

              n = 6.24 moles

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.

12 is it do you think so