1.

Number of atoms in 558.5 g Fe (molar mass Fe= 55.85 g mol^(-1))

Answer»

twice than in 60 g carbon
`6.023 XX 10^(22)`
HALF that of 8g He
`558.6 xx 6.023 xx 10^(23)`

SOLUTION :558.5 g Fe = 10 moles
`=10 xx 6.023 xx 10^(23)`atoms.
60 g C = 5 moles `=5 xx 6.023 xx 10^(23)` atoms.


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