Which of these statements about the Plum-Pudding Model is incorrect? It was disproven by Ernest Rutherford.
It is a model of the atom that had electrons within a positively charged sphere.
It is a model of the atom that has electrons surrounding the nucleus.
It was proposed by J. J. Thomson.

Achemistry student weighs out of phosphoric acid , a triprotic acid, into a volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with solution. calculate the volume of solution the student will need to add to reach the final equivalence point. round your answer to significant digits.

What forms when chemical reactions combine pollution with sunlight?

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons? a) 6 b) 8 c) + 1 d) 12 e) 18