What do cinders, charcoal, ember, and fire have that a smoke simply doesn’t have?

the letter "r" i think

Explanation:

well cinders, charcoal, ember and fire are similar right?

well if we look at the letters, they all have the letter R in it, but smoke doesn't

so that's probably the answer

hope this helped :D

Explanation:

The letter R

hope this will help :)

it means there are 3 atoms of oxygen

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.