Question

What is the empirical formula of hydrocarbon D when 2.20 g of D is burnt in excess oxygen, producing 6.90 g of CO2 and 2.83 g of water?

A. CH2
B. C2H5
C. C3H6
D. C4H8

Answer 1

The empirical formula of hydrocarbon D is C2H4.

Step-by-step explanation:

To find the empirical formula of hydrocarbon D, we need to determine the ratio of carbon to hydrogen in the compound.

First, calculate the molar amounts of carbon and hydrogen using the masses of CO2 and H2O produced during combustion.

In this case, 2.20 g of hydrocarbon D produced 6.90 g of CO2 and 2.83 g of water.

Using these masses, we can calculate the moles of carbon and hydrogen.

Next, divide the number of moles of each element by the smallest number of moles to obtain a simple ratio.

In this case, the ratio of carbon to hydrogen is 4 to 8, which simplifies to 1 to 2.

Therefore, the empirical formula of hydrocarbon D is C2H4.