Question

How many atoms are in 5 moles of CH4

Answer 1

molar mass CH4 = 12 + 1 . 4 = 16 g/mol

1 mole CH4 ------------ 16 g
5 moles CH4 ---------- x g

x = 5 . 16

x = 80 g


16 g CH4 ------------------ 6,02.10²³ atoms
80 g CH4 ------------------ y atoms

16 . y = 80 . 6.02x10²³

16 y =
`4,81.10 ^(25)`

y =
`(4,81.10 ^(25) )/(16)`

y =
`3,01.10 ^(24)` atoms

hope this helps