Period+3+Chemistry

Aldric, Andrew, Erica, Shane.

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Mazda, Derek, Charles, Ryan

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Sean, Kris, Michelle, Aaron,

Shane Looker, Jesus Arechiga, Alex Arellano
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Jaipal K., Ashley B. Brittney N., and Kris
[|Magnesium Oxide Lab Video] (could not upload video)

Stephanie Ho, Stephanie Chen, and Rachel Velasco media type="youtube" key="bPo-8sHW8NI?fs=1" height="385" width="640"

Sam Dorsey, Nikki Havey, Crystal Pereira, and Page Silva media type="youtube" key="BQZtckjz-8Q?fs=1" height="385" width="640"

Table A- A lesson on scientific Notation.
__What is scientific Notation?__ It is a way to express really big or really small numbers. it allows us to compare numbers without losing track of all the zeros.

__how to write Scientific notation.__ then times the base by a power of 10. [example] 5.3 x 10^3
 * the base** is a number with only one digit in front of the decimal. [example] 5.3

__from standard form to scientific notation.__ place the decimal point so that only a one non-zero number to the left of the decimal. then count the number of spaces the decimal point "moved" from its original position. this becomes the exponent of 10 [example] 5300 = 5.3 x 10^3

__from scientific to standard__ move the decimal point to the right for positive exponents of 10 move to the left for the negative exponents of 10 [example] 5.3 x 10^3 = 5300 [example2] 5.3 x 10^-3 = 0.0053

Dimensional Analysis


//Purpose//: Dimensional analysis is a way to analyze and solve problems using the units of the measurement.

//Helpful Hint//: Anything you measure in dimensional analysis will have some “unit of measure.” The measures could be miles, pounds, grams, or seconds.

//Examples://

1.

2. How many seconds are in a minute?

60 secs= 1 min 60 min=1 hour

__32 secs| 1 minute| 1 hour__
 * 60 sec | 60 minutes

Practice Problems: >
 * 1)  3yds=?in (1yd=3ft)
 * 1) 50mL = ? cups (1L = 4.226cups
 * 2) 0.56kg = ? mg (Convert to g then mg)

Useful conversions: []

Table E Study Guide in the Discussion Tab

SI Units
Distance: Meters = M Mass: Kilogram = Kg Time: Seconds = S Temperature: Kelvin = K Amount of Substance: Mole = Mol

Celcius to Kelvin: Celcius + 273.15 Kelvin to Celcius: Kelvin - 213.15 ( I think it is Kelvin to Celcius: Kelvin - 273.15 .)( Mazda)

1 L= 1000 mL 1Kg= 1000 g  10mm= 1cm 1 deciLiter= 0.1 L

Table B
Multiplication And Division -- The number of significant figures in the result needs to be equal to the number of significant figures in the number with the fewest significant digits

Addition and Subtraction -- The number of places after the decimal point in the result needs to be equal to the smallest number of decimal places in the original measurements

Accuracy and Precision

Sig Fig Rules
- All non-zero digits are significant

- 0's in between #'s are significant
 * 523g = 3 sig figs
 * 6,427,473 = 7 sig figs

- 0's at the beginning of the #'s are NOT significant
 * 5042 = 4 sig figs
 * 2,048,001 = 7 sig figs.

- 0's at the end of some numbers are sometime significant. If there is a decimal point all 0's at the end of the #'s are significant.
 * 0.0032 = 2 sig figs
 * 0.000000372 = 3 sig figs.

- If there is NO decimal point 0's at the end are NOT significant.
 * 0.00000420 = 3 sig figs.
 * 2.000 = 1 sig fig.

- 0's between the decimal point and the #'s are NOT significant
 * 70000 = 1 sig fig.


 * 0.00000000000000067258 = 5 sig figs

Metric Units
1L=1000 mL 1Kg=1000 g  10mm=1 cm  1dL=0.1 L  16oz=1 lb  1oz= 28.35g 1in=2.54 cm 1 mile= 1.61 km  2000lbs= 1 ton 1cm3= 1mL 1 gallon= 4 quarts

1 kg = 2.2 lbs 1 L = 1.06 qts 1 ft = 12 in 1 mile = 2760 yds

= __**Vocabulary**__: =

1) Measurement - A quantity that has both a number and a unit 2) Scientific Notation - A given number written as a product of a coefficient and 10 raised to a power 3) Accuracy - Measure of how close a measurement comes to the actual or true value of whatever is measured 4) Precision - Measure of how close a series of measurements are to one another 5) Accepted Value - The correct value based on reliable references 6) Experimental Value - Value measured in a lab 7) Error - Difference between experimental value and accepted value 8) Percent Error - The absolute value of the error divided by the accepted value multiplied by 100% 9) Significant Figures - A measurement including all of the digits that are known plus the last digit that is estimated 10) International System of Units - A revised version of the metric system 11) Meter - SI basic unit of length 12) Liter - A non-SI unit of volume 13) Kilogram - SI unit of mass 14) Weight - A force that measures the pull on a given mass by gravity 15) Temperature - A measure of how cold/hot an object is 16) Celsius Scale - Sets the freezing point of water at 0 degree Celsius, and the boiling point of water at 100 degrees Celsius 17) Kelvin Scale - Sets the freezing point of water at 273.15 Kelvins, and the boiling point of water at 373.15 Kelvins 18) Absolute Zero - Equal to -273.15 degrees Celsius 19) Energy - Capacity to do work or to produce heat 20) Calorie - Quantity of heat that raises the temperature of 1 gram of pure water by 1 degree Celsius 21) Conversion Factor - A ratio of equivalent measurements 22) Dimensional Analysis - A way to analyze and solve problems using units, dimensions, or measurements