Chemistry Practice Problems Significant Figures Practice Problems Solution: Identify the exact numbers in this list. Select al...

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Solution: Identify the exact numbers in this list. Select all that apply. (a) 56.00 s (a time measured by a stopwatch) (b) 4 choices (the number of choices in this list) (c) 2.54 cm (the number of centimeters in exactly 1 in) (d) 3 lbs (the weight of an object measured on a scale)

Problem

Identify the exact numbers in this list. Select all that apply. 

(a) 56.00 s (a time measured by a stopwatch) 

(b) 4 choices (the number of choices in this list) 

(c) 2.54 cm (the number of centimeters in exactly 1 in) 

(d) 3 lbs (the weight of an object measured on a scale)

Solution

Exact numbers are defined to be definite and usually expressed in whole numbers. 

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