x contains 100 atoms with the mass of 12 and 10 atoms with the mass of 14 calculate the average atomic mass in amu of x

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.

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

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