CHM135H1 Lecture Notes - Lecture 3: Molar Mass, Limiting Reagent, Reagent
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CHM135H1 Full Course Notes
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Course code - lecture 3 - review of chapters 1-4 (2), chapter 5 (periodicity) Not enough information provided - need identity or molar mass of a and c. 0. 2 m; use the formula c1v1 = c2v2, knowing that m = mol/l. Significant figures / decimal place rules in answers. Multiplication / division: sd of answer is to sd of data used (lowest sd if more than one piece of data used) Addition / subtraction: dp of answer is to dp of data used (lowest dp if more than one piece of data used) Data" as in experimental data, so literature values (e. g. atomic mass) not included. Percentage of mass of a certain element out of the total mass of a compound. % mass of h = mass of h in h. Example 2: percentage by mass of oxygen in mo2 is 40. 05%; identify m. % mass of o = mass of o in mo mass of mo.
