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chemistry

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Determine the percentage composition of each of the following compounds
a) NaCl
b) AgNO3
c) Mg(OH)2

for NaCl i got na=23/135=0.17 x 100= 17% Cl=35/135=0.26 x 100=26%

for AgNO3 i got 108/42 which im sure was wrong and i didn't get how to complete the problem..
for Mg(OH)2 i didn't have a clue

  • chemistry - ,

    In a), where did the 135 come from?
    In b), where did the 42 come from?

    See my answer to your previous post of the same question.

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