· $\rm CH_4$

$\rm \hspace{0,95cm}H\\ \hspace{1,05cm}|\\H-C-H\\\hspace{1,05cm}|\\\hspace{0,95cm}H$

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· $\rm C_3H_8$

$\rm \hspace{0,95cm}H\hspace{0,55cm}H\hspace{0,55cm}H\\ \hspace{1,05cm}|\hspace{0,8cm}|\hspace{0,8cm}|\\H-C-C-C-H\hspace{0,95cm}(CH_3-CH_2-CH_3)\\\hspace{1,05cm}|\hspace{0,8cm}|\hspace{0,8cm}|\\\hspace{0,95cm}H\hspace{0,55cm}H\hspace{0,55cm}H$

Đáp án:

Giải thích các bước giải:

 CTCT `CH_4:`

$\rm\hspace{1cm}H\\\hspace{1,055cm}|\\H-C-H\\\hspace{1,055cm}|\\\hspace{1cm}H$

Viết gọn: `CH_4`

CTCT `C_3H_8:`

$\rm \hspace{1cm}H\hspace{,55cm}H\hspace{,55cm}H\\\hspace{1,1cm}|\hspace{,75cm}|\hspace{,8cm}|\\H-C-C-C-H\\\hspace{1,1cm}|\hspace{,75cm}|\hspace{,8cm}|\\\hspace{1cm}H\hspace{,55cm}H\hspace{,55cm}H$

Viết gọn :`CH_3-CH_2-CH_3`