22.4 L of hydrogen gas contains how many molecules?
The temperature and pressure chosen for this answer,
The connection between
At a pressure of 1 bar and a temperature of 0 °C, 22.4 L of hydrogen gas contains
The number of molecules depends on the temperature and pressure of the gas.
I shall arbitrarily assume that the gas is at STP (1 bar and 0 °C).
We can use the Ideal Gas Law to calculate the moles of hydrogen:
#color(blue)(|bar(ul(color(white)(a/a)PV = nRT color(white)(a/a)|)))" "#
We can rearrange this to get
#n = (PV)/(RT)#
We know that 1 mol of a gas contains