If two object are moved closer together, the force of gravity between them will
a. decrease
b. increase
c. not change
d. cease to exist

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.

elements make up everything, and they combine to make compounds.

the answer is c

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.