What is the percent by mass of hydrogen in aspirin, $C_{9} H_{8} O_{4}$ $C_9H_8O_4$ ?

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What is the percent by mass of hydrogen in aspirin, $C_{9} H_{8} O_{4}$ $C_9H_8O_4$ ?

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Answer 1 · 2018-01-17T00:27:25

$5.035 %$ $5.035%$

Explanation:

We first need to find the molar mass of aspirin, which is $180.157 g / m o l$ $180.157g"/"mol$ . A hydrogen atom has a molar mass of $1.008 g / m o l$ $1.008g"/"mol$ . There are $9$ $9$ hydrogen atoms, so they have a total molar mass of $1.008 \cdot 9 = 9.072 g / m o l$ $1.008*9=9.072g"/"mol$ .

So, the mass of hydrogen accounts for

$\frac{9.072}{180.157} \cdot 100 % \approx 5.035 %$ $9.072/180.157*100%~~5.035%$

the mass of aspirin $(C_{9} H_{8} O_{4})$ $(C_9H_8O_4)$ .

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What is the percent by mass of hydrogen in aspirin, $C_{9} H_{8} O_{4}$ $C_9H_8O_4$ ?

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What is the percent by mass of hydrogen in aspirin, C9H8O4C_9H_8O_4?

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What is the percent by mass of hydrogen in aspirin, $C_{9} H_{8} O_{4}$ $C_9H_8O_4$ ?