Chem Lecture Chapter One Introduction to Chemistry States of Matter GLS properties etc Types of Energy PE KE equations what are they how they change Physical vs Chemical Changes Basic data analysis accuracy and precision difference between the two UNITS uncertainty difference in accuracy of measurements 10 24 four is the uncertain number an estimation Significant Figures Any non zero digit 1 9 significant always Zeros trailing zero with a decimal point 4 30 mL 0 is significant Sandwiched 307 g Examples 7 543 4 sig figures 0 52 2 0 9087 4 34 0 3 1 2x106 2 10 1 10 2 0 000004 1 Adding and Subtracting SF is determined by the number of decimal places 13 4 0 066 1 02 14 486 14 5 4 35 0 137 g 10 83mL 4 213 10 83 4 21g 10 83mL 0 388374g mL 0 389g mL Multiplying and Dividing SF is determined by the lowest number of significant figures that you are using 0 235x450x1 367 144 56025 140 Conversions K H class Monday D base unite d c m king henry drank during Dimensional Analysis watch SF and always make sure that units cancel
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