Question

Write the formula for (a) an alkyne with 16 hydrogen atoms. (b) an alkene with 44 hydrogen atoms. (c) an alkane with ten carbon atoms.

Short answer

Answer: The molecular formulas of the compounds are C_9H_16 for the alkyne, C_22H_44 for the alkene, and C_10H_22 for the alkane.

Step-by-step solution

Find the number of carbon atoms in the alkyne

The given information is that the alkyne has 16 hydrogen atoms. Use the general formula of alkynes, C_nH_(2n-2), and substitute the number of hydrogen atoms to find the number of carbon atoms (n) in the alkyne: 16 = 2n - 2 18 = 2n n = 9 So, the alkyne has 9 carbon atoms.

Write the formula of the alkyne

Now that we know the alkyne has 9 carbon atoms, we can write the molecular formula: C_9H_16 So, the formula for the alkyne with 16 hydrogen atoms is C_9H_16.

Find the number of carbon atoms in the alkene

The given information is that the alkene has 44 hydrogen atoms. Use the general formula of alkenes, C_nH_(2n), and substitute in the number of hydrogen atoms to find the number of carbon atoms (n) in the alkene: 44 = 2n n = 22 So, the alkene has 22 carbon atoms.

Write the formula of the alkene

Now that we know the alkene has 22 carbon atoms, we can write the molecular formula: C_22H_44 So, the formula for the alkene with 44 hydrogen atoms is C_22H_44.

Write the formula of the alkane with 10 carbon atoms

The given information is that the alkane has 10 carbon atoms. Use the general formula of alkanes, C_nH_(2n+2), and substitute in the number of carbon atoms to find the molecular formula of the alkane: C_10H_(2(10)+2) C_10H_22 So, the formula for the alkane with 10 carbon atoms is C_10H_22.