Can someone help a dude out im stuck on this question

Agas has a volume of 0.7 l at 300 mmhg. what would be the new volume at 900 mmhg

The minerals found in bones are deposited by living cells called

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?