The form three students were given acetic anhydride of molar weight 102.09(g/mol) and the mass of acetic anhydride is 3.24g and the number of moles were 31.7(mmol). Calculate it's density (g/mL) and it's volume (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.

Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.

Which process describes vaporization that takes place below the surface of a liquid? condensation melting boiling evaporation