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Answer 1 · 2017-04-30T22:37:45

Find the total mass and change the mass of each element to a percentage.

The theoretical ratio is # 24/ 16 # : Mg/O by mass which reduces to a # 3/2# ratio by mass.

converts this to percentages.

The total is # 2+3 =5#

Mg # = 3/5xx100 = 60%# Mg

O # = 2/5 xx 100 = 40% O

The experimental ratio is # 0.5/0.4 # = #( Mg)/O#

The total is # 0.5 + 0.4 = 0.9 #

Mg # = 0.5/0.9 = 55.55%# Mg

O # = 0.4 /0.9 = 44.44% O

There is a experimental error of 7.5% for the percentage composition for Magnesium.