Answer:

Explanation:
Hello,
In this case, since we can consider hydrogen gas as an ideal gas, we check the volume-pressure-temperature-mole relationship by using the ideal gas equation:

Whereas we are asked to compute the moles given the temperature in Kelvins, thr pressure in atm and volume in L as shown below:

Best regards.
Answer:
A, Vapor pressure is very high
You would be able to tell if you could see it on the period table ig.
Did you have any choices??
Answer:
.5 moles
Explanation:
in one mole there are 6.02x10^23 particles. 3.01x10^23 is one half of a mole