Questions: A 50.0 g sample of an unknown compound contains 14.19 g Na , 19.76 g O , and 16.05 g Cr . What is the percent composition of Na in the compound? [?]% Na

Solution Steps

The total mass of the compound is given as 50.0 g.

The mass percentage of Na in the compound is calculated using the formula: \[ \text{Percent composition of Na} = \left( \frac{\text{Mass of Na}}{\text{Total mass of the compound}} \right) \times 100 \] Substituting the given values: \[ \text{Percent composition of Na} = \left( \frac{14.19 \, \text{g}}{50.0 \, \text{g}} \right) \times 100 \]

\[ \text{Percent composition of Na} = \left( \frac{14.19}{50.0} \right) \times 100 = 28.38\% \]

Final Answer