Um balão de aniversário contém 3 ⋅ 10−5 mol de átomos de He, o que corresponde a?

a) 1,8 ⋅ 1018 átomos.

b) 1,8 ⋅ 1019 átomos.

c) 1,8 ⋅ 1020 átomos.

d) 3,6 ⋅ 1018 átomos.

e) 3,6 ⋅ 1019 átomos

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