Chapter 1 Notes
Chapter 1 Notes General Chemistry 1305
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This 1 page Class Notes was uploaded by Arieana Notetaker on Sunday September 27, 2015. The Class Notes belongs to General Chemistry 1305 at University of Texas at El Paso taught by Dr. Geoffrey Saupe in Summer 2015. Since its upload, it has received 176 views. For similar materials see General Chemistry in Chemistry at University of Texas at El Paso.
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Lectures notes?? Yes please! Looking forward to the next set!
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Date Created: 09/27/15
General Chemistry Chapter 1 notes 1 Scientific notation A The general structure of a number in scientific notation is N10quotx 1 N is the number greater than or equal to one but less than ten 1 S N S 10 2 The exponent X is the integer X is equal to the number of times the decimal was moved to the left or the right to perform the conversion 0 x is positive when the decimal is moved to the left 0 x is negative when the decimal is moved to the right gt Example 50390 X 10quot3 0050390 gt Moving the decimal three spaces to the right makes the exponent a negative 11 Sig Figs A The rules of significant figures 1 ALL nonzero digits are significant 2 Zeros between nonzero digits are significant 3 For a less than zero 0 All digits to the right of the 1st nonzero digits are significant 4 For a greater than 0 0 All digits to the right of the decimal are significant 0 If no decimal place is given the of sig figs is ambiguous B Adding subtracting multiplying and dividing 1 When adding or subtracting sig figs take the least amount of s to the right of the decimal place 2 When multiplying or dividing sig figs take the least amount of sig figs of the entire number the numbers before and after the decimal 0 Example gt 237504mg added to 1037g gt 2357504mg x 100g 000237504g 100 is the number of mg to g so the sig fig rules do not count on here gt 1037g 000237504g 1037g III Dimensional Analysis A DA is used in the conversion between a value expressed in one kind of unit and another B Allows us to convert units into more practical measurements C Allows us to convert the seconds originally increased into the unit necessary 1 Example 0 Suppose that 237504 mg NaCl is dissolved to make 352 ml solution gt Step 1 convert mg to g 237504mg 100g 000237504g gt Step 2 D mv 237504mg NaCl 1 g 1 mL352mL 1000g 675gL