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LECTURE TOPIC I: Problem Solving in Chemistry

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LECTURE TOPIC I: Problem Solving in Chemistry

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Starter

Starter. SN. A group of students are asked to express this number ( 00.003048 ) to three significant figures. Which of the following are correct? .003 .003050 3.048 x 10 3 3.05 x 10 -3 .00305. d. and e. are both correct. Conversions. Converting From One System of Units to Another.

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Solutions Class #4

Solutions Class #4. Parts Per Million and then, The colligative properties of water.

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CHAPTER 3 NOTES Scientific Measurement

CHAPTER 3 NOTES Scientific Measurement. Measurement. Qualitative measurements give results in descriptive , nonnumeric form. (Red balloon, tiny animal) Quantitative measurements give results in a definite form, usually numbers and a unit . (8 cm radius balloon, 6.8 kg animal).

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Approximation

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SIGNIFICANT FIGURES (Sig Figs)

SIGNIFICANT FIGURES (Sig Figs). 3.1. Suppose you estimate a length that is between 2.4 cm and 2.5 cm to be 2.45 cm. The first two digits (2 and 4) are known. The last digit (5) is an estimate and involves some uncertainty.

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Measurement Notes

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Significant Figures

Significant Figures. CHM 235 - Dr. Skrabal. Definition: Minimum # of digits needed to express a number in scientific notation without a loss of accuracy

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Solving Series circuits How to Whiteboards

Solving Series circuits How to Whiteboards. A Series Circuit has many voltages, but only one current. A 1. Note that the total voltage drops add to source voltage. 1 ?. V 1 = IR = (3 A)(1 ?) = 3 V. V 1. 24 V. V 2 = IR = (3 A)(2 ?) = 6 V. 2 ?. V 2. A 2.

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Mathematical Operations with Significant Figures

Mathematical Operations with Significant Figures. When completing math calculations, the final answer must be reported rounded to the appropriate number of significant figures. The answer is rounded according to the LAST mathematical operation completed.

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DN: 9/14 Significant Figures

10. 9. 8. 7. 6. 5. 4. 3. 2. 1. DN: 9/14 Significant Figures.

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