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Calculate the percent by weight of sodium (Na) and chlorine (Cl) in sodium chloride (NaCl) * Calculate the molecular mass (MM):

MM = 22.99 + 35.45 = 58.44 * Calculate the total mass of Na present:

1 Na is present in the formula, mass = 22.99 * Calculate the percent by weight of Na in NaCl:

%Na = (mass Na ÷ MM) x 100 = (22.99 ÷ 58.44) x 100 = 39.34% * Calculate the total mass of Cl present:

1 Cl is present in the formula, mass = 35.45 * Calculate the percent by weight of Cl in NaCl:

%Cl = (mass Cl ÷ MM) x 100 = (35.45 ÷ 58.44) x 100 = 60.66% The answers above are probably correct if %Na + %Cl = 100, that is,

39.34 + 60.66 = 100.

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17y ago

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