contestada

7. Write a formula for each of the following:
(a) an alkane with 22 carbon atoms
(b) an alkene with 17 carbon atoms
(c) an alkyne with 13 carbon atoms.


Respuesta :

Answer : The formula for each of the following is:

(a) [tex]C_{22}H_{46}[/tex]

(b) [tex]C_{17}H_{34}[/tex]

(c) [tex]C_{13}H_{24}[/tex]

Explanation :

  • Alkanes are hydrocarbon in which the carbon atoms are connected with single covalent bonds.

The general formula of alkanes is [tex]C_n H_{2n+2}[/tex] where n is the number of the carbon atoms present in a molecule of alkane.

  • Alkenes are hydrocarbon in which the carbon atoms are connected with double covalent bonds.

The general formula of alkenes is [tex]C_n H_{2n}[/tex] where n is the number of the carbon atoms present in a molecule of alkene.

  • Alkynes are hydrocarbon in which the carbon atoms are connected with triple covalent bonds.

The general formula of alkynes is [tex]C_n H_{2n-2}[/tex] where n is the number of the carbon atoms present in a molecule of alkyne.

(a) An alkane with 22 carbon atoms

Putting n = 22 in the general formula of alkane, we get the formula of alkane as, [tex]C_{22}H_{2(22)+2}[/tex] or [tex]C_{22}H_{46}[/tex]

(b) An alkene with 17 carbon atoms

Putting n = 17 in the general formula of alkene, we get the formula of alkene as, [tex]C_{17}H_{2(17)}[/tex] or [tex]C_{17}H_{34}[/tex]

(c) An alkyne with 13 carbon atoms

Putting n = 13 in the general formula of alkyne, we get the formula of alkyne as, [tex]C_{13}H_{2(13)-2}[/tex] or [tex]C_{13}H_{24}[/tex]

Answer:

[tex]\huge \boxed{{C_{22} H_{46} \ \ \ \ C_{17} H_{34} \ \ \ \ C_{13} H_{24}}}[/tex]

Explanation:

[tex]alkanes \ \Rightarrow \ C_n H_{2n+2}[/tex]

[tex]C_{22} H_{2(22)+2}[/tex]

[tex]C_{22} H_{44+2}[/tex]

[tex]C_{22} H_{46}[/tex]

[tex]alkenes \ \Rightarrow \ C_n H_{2n}[/tex]

[tex]C_{17} H_{2(17)}[/tex]

[tex]C_{17} H_{34}[/tex]

[tex]alkynes \ \Rightarrow \ C_n H_{2n-2}[/tex]

[tex]C_{13} H_{2(13)-2}[/tex]

[tex]C_{13} H_{26-2}[/tex]

[tex]C_{13} H_{24}[/tex]