Question

What is the approximate percent by mass of oxygen in C2H4O2

Answer 1

Approximately 53.3 %.

Step-by-step explanation:

Molar mass of C2H4O2

= 2 * 12.011 + 4 * 1.008 + 2 * 15.999

= 60.052

% oxygen = (31.998* 100) / 60.052 = 53.28 %