A gas is collected at 740. mmHg and 23.0 degrees C. The subsequent volume is not measured until the next day when the pressure is 745 mmHg and the temperature is 20.0 degrees C, at which time the volume is found to be 15.3 mL. What was the original volume

h let me think

i do not get it   at all

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter  

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.