Question

Step 7: To find the percentage of oxygen and the percentage of carbon use this equation:

% mass = (mass of the element ion)/ (weight of the container) x 100

% mass of carbon = (21.6 grams C)/(50 grams)x 100 = 43.2 % C

% mass of sodium = ( ? grams Na)/ (737 grams) x 100 =? % Na

% mass of oxygen = (28.8 grams O)/(50 grams) x 100 = 57.6 % O

% mass of chlorine = ( ? grams Cl)/ (737 grams) x 100 =? % Cl

*check your answer % mass should total approximately 100% *