Question #7f1a4

1 Answer
P dilip_k
Aug 14, 2016

#2.216g#

Explanation:

#"No.of moles of "Fe_2O_3" in its "3.168g" mass"#

#="3.168 g"/(159.7g/"mol")=3.168/159.7mol#
#"Now " 1" mol "Fe_2O_3" contains "2" moles "Fe#

So
# 3.168/159.7"mol"Fe_2O_3 " contains "2xx3.168/159.7"mol "Fe#

Hence mass of Fe
#= 2xx3.168/159.7"mol "xx55.85g/"mol"~~2.216g#

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