Question

According to the pattern of carbon and hydrogen atoms in alkynes, if a molecule has five carbon atoms, how many hydrogen atoms does it have?

Answer 1

On PLATO the answer is D.) 8

Answer 2

Answer: The number of hydrogen atoms in alkyne having 5 carbon atoms are 8.

Explanation:

Alkynes are a group of hydrocarbons which contain triple bond between carbon and carbon atoms and single bonds between hydrogen and carbon atoms.

The general formula for this group of hydrocarbons is $C_nH_{2n-2}$ where n = 1, 2, 3, 4 ...

For the compound having 5 carbon atoms, the number of hydrogen atoms will be $C_5H_{((2\times 5)-2)}=C_5H_8$

Hence, the number of hydrogen atoms in alkyne having 5 carbon atoms are 8.