Percentage Composition

• 88.89%

• 11.11%

• 50%

• 25%

• 27.27%

• 72.73%

• 44.44%

• 55.56%

• 75%

• 25%

• 20%

• 80%

• 82.35%

• 17.65%

• 50%

• 25%

What is the percentage composition of chlorine in sodium chloride (NaCl)? The atomic masses are Na = 23 and Cl = 35.5.

• 39.34%

• 60.66%

• 50%

• 70%

• 40%

• 20%

• 12%

• 28.57%

• 53.33%

• 40%

• 6.67%

• 50%

• 32.65%

• 65.31%

• 2.04%

• 40%

Find the percentage composition of magnesium in magnesium oxide (MgO). The atomic masses are Mg = 24.3 and O = 16.

• 60.3%

• 39.7%

• 50%

• 75%

• 15.77%

• 28.23%

• 56.46%

• 10.53%