below. Some chemical factories make hydrogen gas (Hz) using a process called steam methane reforming. In this process, methane (CH4) combines with steam (H20) at high temperatures to form a mixture of hydrogen gas and carbon monoxide (CO). This mixture can then be used to make substances like hydrogen fuel and ammonia. In the chemical reaction described in the passage, which of the following are reactants?

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substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.

the correct answer would be b) volume versus temperature, because they are also directly proportional.