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If you have the same mass and volume of two different radioactive substances, which will be radioactive longer-the one with a larger half-life or the one with the shorter half-life?

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.