CHE 2A Lecture Notes - Lecture 1: Hydrazine, Potassium Chloride, Atomic Theory
19
CHE 2A Full Course Notes
Verified Note
19 documents
Document Summary
Law of conservation of mass: mass cannot be created or destroyed. Reactants ---> products (chemical reactions) (starting materials) (ending materials) 1. 446g sample of potassium reacts with 8. 178g of chlorine to produce potassium chloride as the only product. After the reaction, 3. 960g of chlorine remains unreacted. Law of definite proportions: all samples of the same species is composed of the. 1. same number and type of subatomic particles (aka atoms) Law of multiple proportions: if we combine elements together they must exist in. The following data were obtained for compounds of nitrogen and hydrogen. 0. 108: show that the data is consistent with law of multiple proportion. Find ratio of mass hydrogen to one gram of nitrogen (normalizing to nitrogen) A/b= (ha/na)/ (hb/nb)= (0. 108/0. 500)/(0. 072/1. 000)=3 (means 3x as much hydrogen in a compared to b) C/b= (0. 108/0. 750)/(0. 072/1. 000)=2 (2x as much h in c compared to b: if formula for compound b is n2h2, what are the formulas for compounds a and.
