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Internet chpt 03 - Page of 7 1 C H M 1120 D r A da ms Chap...

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Page of 7 CHM 1120 Dr. Adams Chapter 3-Internet APPLY I N G MEASURE M E N TS TO CHE M I CAL CALCULAT I O NS 3.2 Multiplying Fractions Review the rules for multiplying two fractions. Review sample exercises 3 and 4 on page 64. It is assumed that you are comfortable with these types of calculations. On page 556 there is a review of basic math that may be of value to you if your math skills are rusty. 3.0 × 1.5 = 3.0 × 1.5 = 4.5 = .56 2.0 4.0 2.0 × 4.0 8.0 3.3 Unit Conversion The following are equalities. Although they are expressed using different units, their quantities are the same (similar to 100 pennies being equal to one dollar bill). 1.00 in = 2.54 cm 454 g = 1.00 lb 1.00 L = 1.06 qt Equalities if two expressions are linked by an equal sign, they are to be equal quantities -You need to be able to use the unit conversion method to change convert a quantity from one unit to an equal amount in another unit. Such as changing cm to in. - The Unit Conversion Method (pg 66) 1. Identify the quantity and unit and write it down 2. Identify the desired new unit 1 1
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Page of 7 3. Determine the conversion factor 4. Complete the calculation -Complete these conversions.
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