Chemistry
9th Edition
ISBN: 9781133611097
Author: Steven S. Zumdahl
Publisher: Cengage Learning
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Textbook Question
Chapter 1, Problem 58E
A thermometer gives a reading of 96.1°F ± 0.2°F. What is the temperature in °C? What is the uncertainty?
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A thermometer is removed from a room where the temperature is 70° F and is taken outside, where the air temperature is 20° F. After one-half minute the thermometer reads 50° F. What is the reading of the thermometer at t = 1 min? (Round your answer to two decimal places
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How long will it take for the thermometer to reach 25° F? (Round your answer to two decimal places.)
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I don't understand the wording. The least significant digit means the last digit?
7.700 X 2.1 = 16.17 would the uncertainty be 0.01 ?
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A Chemistry 20 student uses a thermometer and a hot plate and measures the boiling point of ethyl alcohol to be 74.1 ºC. Then, she looks in a reference book and finds that the actual boiling point of ethyl alcohol is 78.4 ºC. What is her percent error?Record only your final answer with the correct number of significant digits and the proper units.
Chapter 1 Solutions
Chemistry
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- A Chemistry 20 student uses a thermometer and a hot plate and measures the boiling point of ethyl alcohol to be 71.1 ºC. Then, she looks in a reference book and finds that the actual boiling point of ethyl alcohol is 78.4 ºC. What is her percent error?Do not show your work in the space provided.Record only your final answer with the correct number of significant digits and the proper units.arrow_forwardA student measures the melting point of an unknown compound to be 53.5 degrees C. She later discovers that the compound is chlorothymol, with a true melting point of 58.8 degrees C. Calculate her percent error to the correct number of significant figures. The required formula is in the image provided.arrow_forwardm means meter. TV waves travel at the speed of light (“c”), roughly 3.00 x 108 m/s. How long does it take for a Tv message to reach the edge of our solar system, roughly 9.0×109 miles from Earth? Use proper significant figures. One mile= 1.609 km.arrow_forward
- A Chemistry 20 student uses a thermometer and a hot plate and measures the boiling point of ethyl alcohol to be 71.1 °C. Then, she looks in a reference book and finds that the actual boiling point of ethyl alcohol is 78.4 °C. What is her percent error? Do not show your work in the space provided. Record only your final answer with the correct number of significant digits and the proper units.arrow_forwardgive the number of significant figures present and the uncertainty associated with 10,230.20arrow_forwardThe lowest temperature recorded in a particular city during the past year was –16.53° C. What was the temperature on the Kelvin scale? 252.62 T = K Incorrect The highest temperature recorded in the same city during the past year was 300.31 K. What was the temperature in degrees Celsius? T = 27.16arrow_forward
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- Round each answer to the correct number of significant figures. 9 +2.8 - 0.135+10.8=22.265 My previous answer was 22.3 it was incorrected.arrow_forwardThe lowest temperature recorded in a particular city during the past year was –16.53° C. What was the temperature on the Kelvin scale? T = K The highest temperature recorded in the same city during the past year was 300.31 K. What was the temperature in degrees Celsius? T = °C * TOOLS x10arrow_forwardMy lab partner writes the following calculation in our lab notebook: ((43.3 degrees C) (1.8 degrees F/1 degree C))+ (32 degrees F) = 109.9 degrees F What, if anything, is wrong with this calculation? Nothing; the calculation is fine as is When converting from degrees C to degrees F, you must add 32 degrees Fahrenheit before multiplying by the conversion ratio Only the conversion ratio relating degrees F to degrees C needs to be used here You need to subtract 32 degrees Fahrenheit, rather than adding them The calculation was done incorrectly, and this should really be 116. 2 degrees F Clear my selectionarrow_forward
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