How many grams of oxygen are produced by the decomposition of 1 mole of potassium chlorate, #KClO_3# in the reaction #2KClO_3->2KCl+3O_2#?

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Answer 1 · 2016-04-13T16:11:41

#"48g"#

#"2KClO"_3rarr"2KCl"+"3O"_2#

This tells us that for every 2 moles of potassium chlorate that are decomposed, then 3 moles of oxygen gas is produced.

Using simple proportion:

#2"mol"rarr3"mol"#

#:.1"mol"rarr3/2"mol"#

The #"M"_r"# of #"O"_2=32#

#:."mass O"_2=32xx3/2=48"g"#