CHM135H1 Lecture Notes - Lecture 2: Paper Clip, Significant Figures, Dimensional Analysis
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CHM135H1 Full Course Notes
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Review is chapter 1-3, and parts of chapter 4. What volume will be are left with x unit b occupied. 0. 9978 g the kg"s cancel out and the g cancels. = 1. 75 x 10^3 ml accuracy: how close the measurement is to the true value precision: how close the points are to each other. The points are close to the true value, but there is scatter. Paper clip (is it 2. 72, 2. 74, or 2. 73 cm?) Write down all certain figures and one estimated digit. 0. 036653 has 5 sf (placeholders and leading zeros do not count) 7. 2100 x 10-3 g has 5 sf(trailing zeros count) 72 100 km has 3 to 5 (we don"t know if the zeros are placeholders or significant) . 03 has trick question, it"s an exact quantity, we can treat it as if it has infinite significant figures. Matter: anything that has both mass and volume. Properties to describe or identify matter: mass and temperate, etc.
