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Integers
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 1 Amanda performs an endothermic reaction in a flask on the bench. At the beginning of the reaction the temperature in the flask is 22C. The temperature decreases by 19C. What is the new temperature?
 2 Professor Smith keeps the enzymes he uses in the lab in a special freezer that maintains a temperature of -70C. One day there was a power failure and the freezer stopped working. If the temperature reaches -9C or above for more than a couple of hours, the enzymes would start to lose their effectiveness. He does not want that to happen. If the temperature in the freezer starts to rise at a rate of 4C per hour, how long will it be until the enzymes are in danger of being degraded?
 3 Mr. Bloop put a vial of protein powder in the -29C freezer. It was accidentally left out on the lab bench by one of his students. It had been there for most of the day, and the temperature in the lab was 16C. Once in the freezer, the temperature of the powder began to drop at a rate of 4C every 5 minutes. Assuming the temperature change rate was constant (which it really isn't, but we'll pretend), how long would it take to get to the temperature of the freezer?
 4 Jordan dried some plant roots in the oven. She found that the mass of the roots changed by -40%. The mass after drying was 50 grams. What was the mass before drying? Round your answer to the nearest whole number.
 5 * This is a pre-made sheet.Use the link at the top of the page for a printable page.
 6 Organic compounds of varying carbon chain lengths have boiling points that increase as the number of carbon atoms increases. Methane (CH4) boils at -164C. If another carbon compound with a longer carbon chain boils at a temperature that is 85C higher than the boiling point of methane, what is its boiling point?

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