Final answer:
The percent composition of carbon in the compound is 29.1%.
Step-by-step explanation:
To calculate the percent composition of carbon, we need to find the mass of carbon as a percentage of the total mass of the compound. In this case, we have 2.3 grams of carbon and 5.6 grams of hydrogen. The total mass of the compound is 2.3 grams + 5.6 grams = 7.9 grams.
The percent composition of carbon is calculated by dividing the mass of carbon by the total mass of the compound and multiplying by 100%: (2.3 grams / 7.9 grams) * 100% = 29.1%
Therefore, the correct answer is A) 29.1%.