According to the law of definite proportions:a. If the same two elements form two different compounds, they do so in the same ratiob. It is not possible for the same two elements to form more than one compoundc. The ratio of the masses of the elements in a compound is always the samed. The total mass after a chemical change is the same as before the change

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.

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions

If you need to add 27.50ml of a solution, which piece of glassware would you use to deliver this volume and explain how you would determine if the 27.50 ml was measured?