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Chemistry 08-29-2016

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Christopher Horras

on 28 August 2016

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Transcript of Chemistry 08-29-2016

Chemistry
August 29th, 2016
Bell Ringer
1) How many significant figures does each of the following numbers have if the digits are precisely measured?

a) 0.00267
b) 1852
c) 1.20500 x 10^4
d) 0.0500520

2) Write the following numbers in scientific notation:

a) 125,002
b) 0.00268
Quiz Corrections
Adding and Subtracting Significant Figures
Title: Lab Activity 2: Density Comparisons
Objective:

Hypothesis:

Materials:

Methods:

Calculations:

Data: (graph)

Conclusion:
Density = Mass/Volume
Class Activity 5
3) Write the measurements for each of the following below. Be sure to include the units and the measurement of uncertainty.
a)
b)
grams
ml
Multiplying and Dividing Significant Figures
Simpler Method for Counting Significant Figures
1) Identify the number of significant figures in the following:

a) 0.00250
b) 2.50 x 10^6
c) 2,500
d) 20,500.

2) Complete the following and round your answers to the appropriate number of significant figures:

a) 2.0 + 16.25
b) 3.045 - 2.50
c) 3.1 x 6.400
d) 180. / 3
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