Chemistry, 05.01.2021 16:50 bmthkaylani
Thallium-208 has a half life of 3.053 minutes. How much of a 78.7g sample is left after 25 minutes?
Answers: 3
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Give a real-world example of an energy transformation that uses two of the following forms of energy: chemical, mechanical, nuclear, gravitational, radiant, electrical, thermal (heat), and/or sound.
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Where are the noble gases located in the periodic table? a. in the center b. on the left side c. in the upper right corner d. on the far right side
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The temperature of a lead fishing weight rises from 26 °c to 38 °c as it absorbs 11.3 j of heat. what is the mass of the fishing weight in grams?
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4al + 3o2 → 2al2o3 what does the "3" in front of o2 stand for? a) it indicates that there are 5 oxygen atoms after you add the coefficient and the subscript. b) it indicates that that there are are total of 6 oxygen atoms all bonded together as a single molecule. c) it indicates that there are 3 oxygen molecules chemically bonded to each other in the reaction. d) it indicates that there are 3 separate oxygen molecules in the reaction.
Answers: 2
Thallium-208 has a half life of 3.053 minutes. How much of a 78.7g sample is left after 25 minutes?...
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