Chemistry, 02.09.2019 20:20, DepressionCentral
Carbon 14 dating assumes that the carbon dioxide on earth today has the same radioactive content as it did centuries ago. if this is true, the amount of carbon 14 absorbed by a tree that grew several centuries ago should be the same amount of carbon 14 absorbed by a tree growing today. a piece of ancient charcoal contians only 155 as much radioactive carbon as a piece of modern charcoal. how long ago was the tree burned to make the ancient charcoal if the half-life of carbon 14 is 5715 years?
Answers: 2
Chemistry, 22.06.2019 20:30, huangjianhe135
The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?
Answers: 3
Chemistry, 22.06.2019 21:30, shiannethorn
How many liters of 3.0 m naoh solution will react with 0.60 liters of 4.0 m h2so4? h2so4 + naoh → na2so4 + h2o 1.2 l 1.6 l 2.4 l 2.8 l
Answers: 3
Chemistry, 22.06.2019 23:00, jolainjoseph01998
What element has similar physical and chemical properties as boron.
Answers: 1
Chemistry, 23.06.2019 08:00, daliakreynin
Which of the following notations would be the appropriate and final way to display the formula for magnesium chloride a. mgcl2 b. mg+2cl–1 c. mgcl2 d. mgcl
Answers: 2
Carbon 14 dating assumes that the carbon dioxide on earth today has the same radioactive content as...
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