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Rus_ich [418]
3 years ago
13

What is the half life of an isotope that is 75% decayed after 16 days?

Chemistry
1 answer:
inna [77]3 years ago
5 0

Answer:

half life will be 8days

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What is the percent by volume of ethanol (C2H60, or ethyl alcohol) in the final solution when 90 mL of ethanol is diluted to a v
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Answer:

16.0%.

Explanation:

Volume percent of a substance is the ratio of the substance volume to the solution volume multiplied by 100.

V % of ethanol = (volume of ethanol / volume of the solution) x 100.

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∴ V % of ethanol = (90.0 mL / 550.0 mL) x 100 = 16.36% ≅ 16.0%.

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Why are you so much older on Mercury?
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Heroin was originally going to be called "wunderlich", a German word for wonderful, since one chemist thought the substance made
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Answer:

heroic

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Bayer, a German pharmaceutical company, named the substance it synthesized "heroin", probably from the word heroisch, German for heroic, because in field studies people using the medicine felt "heroic".

BTW, I found this information on this wedsite: https://www.answers.com/Q/Where_did_heroin_get_its_name

Also, if you want some more history about this drug, you can visit this article: https://www.narconon.org/drug-information/heroin-history.html

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Where does the largest percent of water exist on Earth?
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97% of earth's water is in the ocean. The rest could be found underground, in glaciers and ice, and in rivers and lakes

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