No' of molecules divide by avogadro number , 6×6.023×10^23 so (2.2×10^22)÷(6.023×10^23)
= 0.03653 moles
moles × Molar mass = mass
n×Mr=m
0.03653×40 = 1.46 grams
I think it's the c (<span>.all the gases that surround the Earth)</span>
Because the amount of hydrogens all depends on the valence electrons
D. Energy
The British Thermal Unit measures Energy because theyre is a British group who started it
Hope this helped :)
