If there is a 75.0 g quantity of carbon present in each 100 g of a carbon and hydrogen compound, what is the percent composition of hydrogen in this compound?
A. 25 g
B. 25%
C. 75 g
D. 75%
I say B
To find the percent composition of hydrogen in the compound, we need to determine the mass of hydrogen in the compound and then calculate the percentage relative to the total mass of the compound.
Given that there is a 75.0 g quantity of carbon present in each 100 g of the compound, we can assume that the remaining mass (100 g - 75.0 g = 25.0 g) is due to hydrogen.
So, the mass of hydrogen in the compound is 25.0 g.
To calculate the percent composition of hydrogen, divide the mass of hydrogen by the total mass of the compound and multiply by 100:
(25.0 g / 100 g) * 100 = 25%
Therefore, the correct answer is B - 25%.