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…
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
Answer
Explanation:
Step1: Recall percent - composition formula
Percent composition of an element $=\frac{\text{mass of element}}{\text{mass of compound}}\times100%$
Step2: Identify mass of element and compound
The mass of Na is $m_{Na}=14.19\ g$, and the mass of the compound is $m = 50.0\ g$.
Step3: Calculate percent composition of Na
Percent composition of Na $=\frac{14.19\ g}{50.0\ g}\times100%$ $=\frac{1419}{50}% = 28.38%$
Answer:
$28.38$