'2 sig' diaporamas de présentation

Chemistry and Calculations

Chemistry and Calculations. Chemistry Honors. Accuracy & Precision. Precision: how closely individual measurements compare with each other. Accuracy: how closely individual measurements compare with the true or accepted value. Accurate or Precise?.

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Fundamentals of Chemistry

Fundamentals of Chemistry. Unit One Scientific Method and Measurement. Scientific Method. Scientific Method : The logical approach to problem solving . Steps of the Scientific Method Step 1: Identifying a problem

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Fundamentals of Chemistry

Fundamentals of Chemistry. Unit One Scientific Method and Measurement. Scientific Method. Scientific Method : A way to Solve Problems. Steps of the Scientific Method Step 1: Identify the problem ?To begin the scientific process, a problem must be clearly and specifically identified.

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Significant Figures

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Significant Figures

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Acids - Base Equilibria Part I: pH and Acidity

Acids - Base Equilibria Part I: pH and Acidity. Jespersen Chap. 17 Sec 1 & 2. Dr. C. Yau Fall 2014. 1. 1. Different Definitions of Acid/Base (Chap.16). Arrhenius Definition : An acid is a substance that increases the H 3 O + concentration when placed in water.

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Acids - Base Equilibria Part I: pH and Acidity

Acids - Base Equilibria Part I: pH and Acidity. Jespersen Chap. 17 Sec 1 & 2. Dr. C. Yau Spring 2014. 1. 1. H 2 O + H 2 O H 3 O + + OH ? 2 H 2 O H 3 O + + OH ?. Autoionization of Water.

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Acids - Base Equilibria Part I: pH and Acidity

Acids - Base Equilibria Part I: pH and Acidity. Jespersen Chap. 17 Sec 1 & 2. Dr. C. Yau Spring 2013. 1. 1. H 2 O + H 2 O H 3 O + + OH ? 2 H 2 O H 3 O + + OH ?. Autoionization of Water.

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Significant Figures

Significant Figures. Significant figures tell us the range of values to expect for repeated measurements The more significant figures there are in a measurement, the smaller the range of values is; the more precise. 12.3 cm has 3 sig. figs. and its range is 12.2 to 12.4 cm. 12.30 cm

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2.4 Significant Figures in Measurement

2.4 Significant Figures in Measurement. The significant figures in a measurement include all the digits that are known precisely plus one last digit that is estimated .

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Starter Question

Starter Question. Write the following numbers in scientific notation 0.00568g 256000000km. Write the following number in ordinary notation 5.78x10 4 g 4.23x10 -2 s. Convert the following 752nm to cm 56.4kg to ? g. Express the following quantities in scientific notation. 300.8kg

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Starter Question

Starter Question. Write the following numbers in scientific notation 0.00568g 256000000km. Write the following number in ordinary notation 5.78x10 4 g 4.23x10 -2 s. Convert the following 752nm to cm 56.4kg to ? g. Express the following quantities in scientific notation. 300.8kg

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Scientific notation

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Scientific notation

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Daily Science (August 25)

Daily Science (August 25). Put the following numbers into scientific notation: 209000000 (6 zeroes) 0.0000000231 (7 zeroes) 9.54 0.023 Perform the following calculations (no calc.) (6x 10 -2 ) x (3 x 10 -7 ) (4 x 10 3 ) / (8 x 10 8 ) (2.5 x 10 -8 ) x (3 x 10 11 ). Sig Figs. Pg. 15.

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Review of Temperature Conversion

Review of Temperature Conversion. Dr. C. Yau Spring 2015 (from Chap.1 Sec 4 Jespersen 7 th edition). Temperature Units. You should already be familiar with the following temperature units: Fahrenheit Celsius kelvin. Interconversion of units cannot be done with dimensional analysis.

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