## Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning

# Let's Review: The Tools of Quantitative Chemistry - Study Questions - Page 43b: 28

#### Answer

a) 0.22 b) 5.50 c) Intercept: 0.12; Slope: 18.33 d) 18.46

#### Work Step by Step

a) Looking at the graph at y= 4.0, x is between 0.20 and 0.25, só 0.225 is a close approximation b) Looking at the graph at x=0.3, y is approximately halfway between 5.00 and 6.00, so 5.50 is a good estimate. c) At x= 0.00, y is approximately 1/8 of the way between 0.00 and 1.00, so the intercept is approximately 0.125. Looking at the point y= 7.00, x is approximately 0.375; using this point and the intercept: $slope= \frac{\Delta y}{\Delta x}= \frac{7.00-0.125}{0.375-0.00}=18.33$ d) From the previous item, the line's equation is $y=18.33x+0.12$, so at $x=1,00$, $y=18.46$

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