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Week 3 Notes Chem 110A

by: Mikaela Notetaker

Week 3 Notes Chem 110A CHEM 110

Marketplace > West Virginia University > Chemistry > CHEM 110 > Week 3 Notes Chem 110A
Mikaela Notetaker
Introduction to Chemistry
Melissa G. Ely

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About this Document

These go over Adding/Subtracting Scientific Notation and the combination of Adding/Subtracting/dividing/multiplying Scientific Notation. Also starts to cover conversion, but just barely.
Introduction to Chemistry
Melissa G. Ely
Class Notes
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This 2 page Class Notes was uploaded by Mikaela Notetaker on Sunday February 14, 2016. The Class Notes belongs to CHEM 110 at West Virginia University taught by Melissa G. Ely in Spring 2016. Since its upload, it has received 20 views. For similar materials see Introduction to Chemistry in Chemistry at West Virginia University.


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Date Created: 02/14/16
AdditionSubtraction of exponential numbers 1 Convert to same exponent 2 Addsubtract and round to smallest number decimal a Hint Convert smallest exponent Every time you increase the exponent by 1 move the decimal to the left 537 x 10393112 x 10394ltthis one is smaller Two decigt537 x 10393112 x 103 548 X 10393 123 x 1039221 x 10393ltthis one is smaller Both Two deci123 x 1039221 x 102 102 X 10392 Combined Note when a number is cut off like 6616 it means I am including the number in my calculation for rounding purposes but if I am counting decimal places this number only has 1 and in sig g it only has 2 610 X 104 216 X 1035ma e 3615 X 102 610 X 104 216 X 104 2 sig figgt 6316 x 104 3 615 x 102 6316 3615 X 104 102 17 X 102 Weight Percent Gives information on how much of one substance is in a mixture Equation Weight of Component Total Weight x 100 percent weight Note Solution means total 125 grams of sugar was mixed into 875 grams of water What is the percent of water in the watersugar solution 125g one deci 8750g 10000g 8750g4 sig fig1000Og4 sig g X 100 8750 water Chapter Two Units and Conversions Measurements English Metric M Mass Pound 02 Ton Kilogram gram Kg 9 Length Mile feet inches yard meter kilometer centimeter meter Volume Gallon pint quart kiloliter liter milliliter m3 Temperature Fahrenheit Celsius Kelvin Conversion Between Different Measurement Svstems If multiplying a number by one of these conversion factors you are not changing the value of the number in anyway just changing the unit Use dimensional analysis to convert let the units do the work 635 in to ft 635 in 1 x 1 ft 12 in On paper the in would be diagonal from one another therefor cancelling each other out leaving only ft behind Note that 1 ft is an exact number just like 12 in therefor they do not have sig g like 635 so only 3 sig g 529 ft


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