Who first argued that all matter is made up of particles so small that they could not possibly be divided A)dalton

B)Thomson

C) Rutherford

D) Democritus

The density of a planet is 0.69 g/cm3 (density of water is 1.0 g/cm3). which of the following planets might this be? a. mercury b. venus c. saturn d. mars

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

Calculate the ph at the equivalence point for the titration of a solution containing 150.0 mg of ethylamine (c2h5nh2) with 0.1000 m hcl solution. the volume of the solution at the equivalence point is 250.0 ml. kb forethylamine is 4.7 × 10−4 .