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ALAMO / Engineering / CHEM 1405028 / What are measured numbers?

What are measured numbers?

What are measured numbers?

Description

School: San Antonio College
Department: Engineering
Course: Chemistry 1
Professor: Saumil jayesh christian
Term: Spring 2017
Tags: Chemistry, conversions, studying, equalities, and Problemsolving
Cost: 50
Name: chemistry study guide exam 1 ( Chapters 1 &2 )
Description: Entirely over the first and second chapter. We start really getting into conversion problem solving and equalities. Make sure to pay special attention to how to convert and remembering the metric table as well as the SI tables to use for your problem solving. Happy studying !
Uploaded: 02/04/2017
3 Pages 117 Views 0 Unlocks
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Chemistry : Test I Study Guice (Chapter 1 and 2) Don't forget about the age old question of What are the causes of sexual socialization?

Ch.1

  • Chemicals - substances fund on the periodic table or have mother (liquid, solid, gas)

  • MATTER = CONTAINS CHEMICALS

  • Scientific Method
  • 1) Observations - ask questions about what you see
  • 2) Hypothesis - explanation of the observation
  • 3) Experiments - test hypothesis
  • 4) Conclusion - Is hypothesis true or false?

  • Scientific Notation

Don't forget about the age old question of suppose an apartment complex converts to a condominium

  • 1 < c < 10

  • Measured numbers are the numbers obtained when you measure a quantity of something (Significant Figures) all the digits, including estimated digit. Sig. Fig. are used:
  • to represent all the amount of error associated w/ a measurement
  • are all nonzero digits and zeros between digits
  • are not zeros that act as place holders before digits
  • are zeros at the end of a decimal number.

  • Exact numbers are not measured and do not have a limited number of significant figures. Not used to find the number of sig fig in a calculated answer.
  • Numbers obtained by counting ( 8 cookies)
  • Definitions that compare 2 units (1qt = 4 cups)
  • Definitions of the same measuring system (1kg = 1000g)

Don't forget about the age old question of How do we determine stability?

Ch. 2

  • Prefixes and Equalities - a prefix can be placed in front of any unit to increase or decrease its size by some factor of ten:
  • Ex. Milli and Micro
  • milligram (mg)
  • microgram (mcg)

  • Conversion Factors
  • Equality 60min = 1h        
  • Metric equality 1m = 100cm
  • Problem Solving using Unit Conversion
  • STEP 1 STME THE GIVEN and NEEDED QUANTITIES
  • STEP 2 WRITE OUT YOUR PLAN STEP
  • 3 STATE THE EQUALITIES CONVERSION FA CURS STEP
  • 4 SET UP THE PROBLEM TO CANCEL UNITS CALCULATE
  • Ex. How many minutes are there in 1.4 days?

1.4 days minutes?We also discuss several other topics like What does mixed cost contain?

        

        exact                      exact        We also discuss several other topics like Differentiate macroenomics and microeconomics.

If you want to learn more check out What holds everything together that is bigger than the nucleus, but smaller than a human ?

1.4days x

Wine is 19% Alcohol by volume. How many millimeters of alcohol are in 0. 750L?

100 ml = 1l

L=ml                =100ml of alcohol

                                                                        

Blue Muffins have 51% dietary fiber by mass. If a pack of muffins weighs 12oz  of 6, how many grams does the pack weigh?

Oz gg of fiber                        Given        12oz, 51% df

Oz lbg

1lb=16oz.        1lb=454g

Sig of fiber = 100g of fiber

                

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