This thermochemical equation describes the reaction of nitrogen monoxide with oxygen to produce nitrogen dioxide. How much energy would be released when 1.0 mol of NO2(g) is produced?

The reaction absorbs 57.1 kJ of heat.
The reaction absorbs 57.1 kJ of heat.

The reaction releases 57.1 kJ of heat.
The reaction releases 57.1 kJ of heat.

The reaction absorbs 114.2 kJ of heat.
The reaction absorbs 114.2 kJ of heat.

The reaction releases 114.2 kJ of heat.

b. is the answer hoped i        

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 answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.