4L of a gas is contained at 300kpa and 200k. what’s wills it’s volume be in L at 140 kpa and 100k

Ahydrogen atom has 1 electron. how many bonds can hydrogen form? a) 1 b) 2 c) 3 d) 4 e) 5

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.