Chemistry, 23.08.2019 00:30 heavyhearttim
Asample of carbon of mass 250 mg from wood found in a tomb underwent 2480 carbon- 14 disintegrations in 20 h. estimate the time since death: assuming the modern sample underwent 1.84 times 10^4 disintegrations in the same time period.
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Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?
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What type of chemical bond is formed between two atoms of bromine 1. metallic 2. hydrogen 3. ionic 4. covalent
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Which of the following is a chemical property of water at 4 c
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Asample of carbon of mass 250 mg from wood found in a tomb underwent 2480 carbon- 14 disintegrations...
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