A 2.00-liter sample of nitrogen gas at 27 C an 600 mm Hg is heated until it occupies a volume of 5.00 liters. If the pressure remains unchanged, the final temperature of the gas is a. 68 C
b. 120 C
c. 477 C
d. 677 C

The mass has escaped into a gas which you can not see so the law stays true.

Dsolubility let me know if you have any other questions for chemistry

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts

Here is the link to the all information u need i mean answer key