How much diluent is required to produce 30 mL of a 7% solution from a solution of 25%?

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

What term is applied to a scientist who studies ancient life, including animal and plant fossils a. anthropologist b. dendroclimatologist c. geophysicist d. paleontologist

Which of the following is most likely true about water in chemical systems? a) water dissolves nonpolar ionic compounds. b) water dissociates ionic compounds. c) water dissociates covalent molecules. d) water dissolves nonpolar covalent substances.