What is the mole fraction of sodium chloride (NaCl) in a solution in which 5.50 grams of NaCl is dissolved in 45.0 grams of water?

Photosynthesis converts light energy to chemical energy. which molecules are the end product of this transformation of energy in this reaction?

Agenus is a taxonomic grouping that identifies a collection of species. when a scientist discovers a new species, how is this species assigned to a genus

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots