What mass of solid aluminium is needed to react with excess H2SO4(aq) to produced 20.0 L of H2(g) at 1.0 atm and 298 K?
The mass of aluminium is 15 g.
Calculate the moles of
We can use the Ideal Gas Law:#.
#color(blue)(bar(ul(|color(white)(a/a)pV = nRTcolor(white)(a/a)|)))" "#
We can rearrange this formula to get
#n = (pV)/(RT)#
Calculate the mass of
Note: The answer can have only two significant figures, because that is all you gave for the pressure of the hydrogen..