It helps to know the of the components in a shirt because they affect how warm it is whether it will need to be ironed and how it should be cleaned You will learn how the of the elements ID: 765057
Download Presentation The PPT/PDF document "It helps to know the % of the components..." is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
It helps to know the % of the components in a shirt because they affect how warm it is, whether it will need to be ironed, and how it should be cleaned. You will learn how the % of the elements in a compound are important in chemistry. Chemical Composition Unit 7
% Composition % by mass = mass of element x 100 total mass 194.20 g/mol 294.20 g/mol
% by mass = mass of element x 100 total mass % O = 5.40 g O x 100 = 13.60 g 39.7% O % Mg = 8.20 g Mg x 100 = 13.60 g 60.3% Mg
% by mass = mass of element x 100 total mass % C = 36.03 g C x 100 = 44.11 g 81.68% C % H = 8.08 g H x 100 = 44.11 g 18.3% H C 3 H 8 : 3 (12.01) + 8 (1.01) = 36.03 + 8.08 = 44.11 g/mol
NH3: %N = 14.01 g N x 100 = 17.04 g 82.22% N NH4NO3: %N = 28.02 g N x 100 = 80.06 g 35.00% N 17.04 g/mol 80.06 g/mol
1. The percent composition of a compound is found by dividing the mass of each element by the ________. moles of each element percent of each element total mass of the compound total number of elements Quick Quiz!
Calculate the percent by mass of carbon in cadaverine, C5H14N 2, a stinky compound present in rotting meat. 67.4% C 58.8% C 51.7% C 68.2% C Quick Quiz.