Question

If you have 110.0 grams of an unknown compound that contains 12.3 grams of hydrogen, what is the percent by mass of hydrogen in the compound

Answer 1

all you have to do is a simple division "parts over the whole"

12.3 grams H/ 110 grams compound x 100= 11.2%

Answer 2

Answer : The percent by mass of hydrogen in the compound is, 11.18 %

Explanation : Given,

Mass of unknown compound = 110.0 g

Mass of hydrogen = 12.3 g

Now we have to calculate the percent by mass of hydrogen in the compound.

`\text{Mass percent of hydrogen}=\frac{\text{Mass of hydrogen}}{\text{Total mass of unknown compound}}* 100`

Now put all the given values in this formula, we get:

`\text{Mass percent of hydrogen}=(12.3g)/(110g)* 100`

`\text{Mass percent of hydrogen}=11.18\%`

Therefore, the percent by mass of hydrogen in the compound is, 11.18 %