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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?
To determine the percent composition of sodium (Na) in the unknown compound, we follow these steps:
1. Identify the given mass of each component in the compound: - Mass of sodium (Na): 14.19 grams - Mass of oxygen (O): 19.76 grams - Mass of chromium (Cr): 16.05 grams - Total mass of the compound: 50.0 grams
2. Calculate the percent composition using the formula: [tex]\[
\text{Percent composition of Na} = \left( \frac{\text{Mass of Na}}{\text{Total mass of the compound}} \right) \times 100
\][/tex]
3. Substitute the given values into the formula: [tex]\[
\text{Percent composition of Na} = \left( \frac{14.19 \text{ grams}}{50.0 \text{ grams}} \right) \times 100
\][/tex]
4. Perform the division and multiplication to find the percent composition: [tex]\[
\left( \frac{14.19}{50.0} \right) \times 100 = 28.38
\][/tex]
Hence, the percent composition of sodium (Na) in the compound is 28.38%.
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