Which numbers are exact (and therefore have an unlimited number of significant figures)? a. π = 3.14 c. EPA gas mileage rating of 26 miles per gallon d. 1 gross = 144
Ch.1 - Matter, Measurement & Problem Solving
Chapter 1, Problem 56a,c,d
Use prefix multipliers to express each measurement without exponents. a. 38.8×105 g c. 23.4×1011 m d. 87.9×10−7 L
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Prefix Multipliers
Prefix multipliers are standard prefixes used in the metric system to denote specific powers of ten. For example, 'kilo-' represents 10^3, 'mega-' represents 10^6, and 'centi-' represents 10^-2. These prefixes simplify the expression of large or small quantities by allowing scientists to communicate measurements more efficiently without using exponents.
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Metric Prefixes Chart
Scientific Notation
Scientific notation is a method of expressing numbers as a product of a coefficient and a power of ten. It is particularly useful for handling very large or very small numbers. In the context of the question, the number 38.8 * 10^5 g can be converted into a more manageable form using prefix multipliers, which helps in understanding and comparing measurements easily.
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Standard Notation to Scientific Notation
Unit Conversion
Unit conversion involves changing a measurement from one unit to another while maintaining the same quantity. In this case, converting grams expressed in scientific notation to a more readable format using metric prefixes requires an understanding of how to translate between different units and their corresponding prefixes, ensuring clarity and accuracy in scientific communication.
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Related Practice
Textbook Question
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Textbook Question
Use scientific notation to express each quantity with only base units (no prefix multipliers). a. 35 mL b. 225 Mm c. 133 Tg d. 1.5 cg
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Textbook Question
Complete the table. b. 1228 g/l _____g/ml _____kg/ml d. 2.554 mg/ml _____g/l _____mg/ml
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Convert each temperature. a. 212 °F to °C (temperature of boiling water at sea level) b. 22 °C to K (approximate room temperature) c. 0.00 K to °F (coldest temperature possible, also known as absolute zero) d. 2.735 K to °C (average temperature of the universe as measured from background black body radiation)
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Textbook Question
Use the prefix multipliers to express each measurement without exponents. c. 1.5 * 109 g
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Textbook Question
Express the quantity 254,998 m in each unit. a. km b. Mm c. mm d. cm
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