Exam 2: The Numerical Side of Chemistry

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There has never been recorded a negative Kelvin temperature.

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Match each unit with another unit of the same physical measurement. -ton

(Multiple Choice)
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Match the units with there measurement from the folowing. -km

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Choose the number that correctly fills the blank in each item . -One pound is equal to ________ oz.

(Multiple Choice)
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For the final sum of 544.36 + 455.64, the number of significant figures is ________.

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2 × 10-3 meters is equal to 2 kilometers.

(True/False)
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How many significant digits are there in the number 740.2?

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Solve the equation PV = nRT for the n-variable.

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500 cal are added to 10 g of water (specific heat of 1.000 cal/g °C) originally at 20 °C. The final temperature is ________.

(Multiple Choice)
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Calculate the amount of energy needed to raise the temperature of 25 mL ethanol (density = 0.80 g/mL) from 10.0 °C to 20.0 °C (c = 0.581 cal/g°C) both in cal and joules.

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Choose the number that correctly fills the blank in each item . -One gallon is equal to ________ pints.

(Multiple Choice)
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Match the correct scientific notation with their standard notation -0.001570

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Round off 907,506 to four significant figures.

(Multiple Choice)
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Express the number 1.06 × 10-4 in standard notation.

(Multiple Choice)
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Match the units with there measurement from the folowing. -g/L

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465.000 g is equivalent to ________.

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Match each unit with another unit of the same physical measurement. -mile

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Convert 15.0 ft3 to m3. Show the math.

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20.5 g of a liquid has a volume of 15 mL. What is the density?

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What is the prefix for the multiplier 1 × 106?

(Multiple Choice)
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