## Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall

# Chapter 1 - Sections 1.1-1.8 - Exercises - Problems by Topic - Page 40: 100

#### Answer

$1,490,625 mile^{2}$ $42.14$ %

#### Work Step by Step

1. Convert value in acres into value in feet by using conversion factor $[1acre=43560feet^{2}]$ $954 \times 10^{6} acres \times \frac{43560 ft^{2}}{1 acre} =4,155,624 \times 10 ^{7} ft^{2}$ 2. Then, convert square feet into square miles by dividing it by conversion factor [ 1 mile = 5280 feet], then [$1 mile^{2} = 5280^{2} ft^{2}= 27878400 ft^{2}$] $\frac{4,155,624 \times 10 ^{7} ft^{2}}{27878400 ft^{2}/mile^{2}}= 1490625 mile^{2}$ 3. To calculate the percentage of total land area, divide the land area value by the total area given $\frac{1490625 mile^{2}}{3537000mile^{2}}\times 100$% = 42.144 % or $\approx$ 42.14%

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