How can I find the percent compositions of Mg(NO3)2?

1 Answer
BRIAN M. · Ernest Z.
May 15, 2014

To find percent composition we need to begin by finding the gram formula mass of the #Mg(NO_3)_2# compound.

Mg 1 atom x 24.31 = 24.31
N 2 atoms x 14.01 = 28.02
O 6 atoms x 15.99 = 95.94
Total Mass = 148.27 g/mol

% Magnesium = #(24.31/148.27)#= .164 or 16.4 %
% Nitrogen = #(28.02/148.27)# = .189 or 18.9%
% Oxygen = #(95.94/148.27)# = .647 or 64.7%


I hope this was beneficial.
SMARTERTEACHER

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