exactly 4.0g of sulfur is burnt in a fume extraction cupboard. The sulfur is ignited in an excess of oxygen: S(s) + O2(g) ➔ SO2 a. What volume of gas will form in dm3 at rtp? b. What volume of oxygen will be used up

what is the density of an object that has a mass of 10 g and a volumeof 5 ml? a. 0.5 g/ mlb. 2 g/mlc. 15 g/ mld. 50 g/ ml

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.

Chemistry worksheet - i am not sure what they are asking for exactly?