D. Modern landfills are now lined with a layer of clay and plastic to keep waste, including any toxic waste, from leaking into the soil; in addition, the landfill is covered with
successive layers of soil, which is compacted. All this reduces the amount of air and
water that reaches the material in the landfill. How might this affect the decomposers in
the landfill and the rate of decomposition?

Please help thank you!

it is called acid bonding

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

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.