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Week 1, Day 3 Notes!

by: Becca LeBoeuf

Week 1, Day 3 Notes! Chemistry 101

Becca LeBoeuf

GPA 3.0

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About this Document

Here is day 3 of our Chemistry notes! In these notes, we cover a few more examples on multiplication and division with sig figs. Then we start to discuss how to solve problems with density, specifi...
General, Organic, Biological Chemistry
George Vater Olsen
#Chemistry #Chem101 #SigFigs #Density #SpecificGravity
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This 3 page Bundle was uploaded by Becca LeBoeuf on Sunday February 7, 2016. The Bundle belongs to Chemistry 101 at University of Wisconsin - Oshkosh taught by George Vater Olsen in Spring 2016. Since its upload, it has received 44 views. For similar materials see General, Organic, Biological Chemistry in Chemistry at University of Wisconsin - Oshkosh.


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Date Created: 02/07/16
Density = mass​    (REMEMBER THIS FOR EXAM)     volume    * liquids typically *      g    OR g  ​ cm^3         ml        (REMEMBER THESE FOR EXAM)    Example 1:  55.00 gallons.  When it is full of water, what mass of water does it contain?    55.00 gallons 4 q x ​46 ml x1.00  x1 lb= 458.4140969 lbs =​6 x 10^1 lbs.              1 gall     1 qt       1 ml     454 g      Example 2:  Density = .897 g/ml  Oil 55 gallon drum.  What is the mass of the oil?    55 gallon 4 qt x946 ml x.897 g= 186683.64 grams = ​9 x 10^4 grams.       1 gall     1 qt       1 ml    Example 3:  Density = 11.3 g/cm^3  Size = 20.20 cm           x 10.10 cm           x   5.001,020.1 g  Density of lead = 11.3 g/cm^3    1020.10 cm^3 x 11.3 ​x​1 k x2.20 l​= ​5.4 lbs.    1 cm^3  1000g   1 kg     Example 4:     2.54 cm = 1 inch            12 inch = 1 foot  Gold density = 19.32 g/cm^3  Weight in lbs = 1200 lbs.  Weight in grams = ?    1 foot x12 inch x ​.54 cm​ = 30.48 cm for each side    1 foot       1 inch    30.48 x 30.48 x 30.48 = 28316.84659 cm^3    28316.84659 x 19.32 = 547081.4762 lbs =  5471 x 10^2 lbs.    Specific gravity = ​ ensity of a substance (g/ml)           density of water 1.00 (g/ml)  (REMEMBER THIS FOR EXAM)    Example 5:  Milk density = 1.032 (specific gravity)        (pie)r^2xh = volume radius = 4.5 feet  h = 1    (4.5 feet x12 in x2.54 cm​ = 137.16 cm)^2       1 foot    1 inch    [18812.8656(pie) x 42 feet x 12 inch x2.54 cm​ ] x1.032 g x 1 l = 170,000 = 1.7 x 10^5 lbs.             1 foot       1 inch      1 cm^3    454 g    Example 6:  volume = (pie)r^2xh      How tall in feet for same volume?    V = (pie)x(30)^2x60 feet = 169646.0033 ft^3    169646.0033 ft^3 = 100 ft x 40 ft x y ft    y = 42.4 feet tall.    WHAT TO REMEMBER FOR TEST:  ● Conversion chart:  ○ Standard → Metric  ○ Standard = what we use (Ex: inch and lbs).  ○ Metric = what we don’t use (Ex: cm and grams).  ● When finding sig figs:  ○ Counted # = infinite amount of sig figs (Ex: 13 bags of cookies).  ○ Measure # = is not (Ex: 100 grams of cookies).  ● On calculator:  ○ EXP or EE key can take place of the x10. 


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