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practiceMidtermI

# practiceMidtermI - Practice Midterm I Information you...

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Practice Midterm I Information you may (or may not) find useful Constants constant value unit speed of light 2.997924 × 10 8 m/s Avogadro’s number 6 . 022 × 10 23 electron charge ( e ) 1 . 6022 × 10 - 19 C electron mass 9 . 1094 × 10 - 31 kg Proton mass 1 . 67252 × 10 - 27 kg Neutron mass 1 . 67495 × 10 - 27 kg Conversions from to conversion Fahrenheit Celsius o C = ( o F - 32 o F ) × 5 o C 9 o F Celsius Fahrenheit o F = 9 o F 5 o C × ( o C ) + 32 o F Celsius Kelvin K = ( o C + 273 . 15 o C ) ( 1 K 1 o C ) 1

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1 Conversions For the following questions, give your answer in scientific notation with the correct number of significant figures. For full credit, show your work in the allotted space for each question. a The density of a colorless liquid was determined to be 0.9561 kg/dm 3 . What is the density expressed in μ g/ μ L? Answer: 6 points b During the morning, the temperature changes from 34 o Fahrenheit to 56 o Fahrenheit. What is the temperature difference expressed in degrees Celsius?
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