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Chemistry, 21.06.2019 22:00
Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.
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Chemistry, 22.06.2019 20:30
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?
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Chemistry, 22.06.2019 23:00
What element has similar physical and chemical properties as boron.
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Chemistry, 23.06.2019 02:30
Apound is approximately 0.45 kilogram. a persons weighs 87 kilograms. what is the persons’s weight, in pounds, when expressed to the correct number of significant figures
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Chemistry, 21.11.2019 14:31
Social Studies, 21.11.2019 14:31
Mathematics, 21.11.2019 14:31
Mathematics, 21.11.2019 15:31
Mathematics, 21.11.2019 15:31
Mathematics, 21.11.2019 15:31
Geography, 21.11.2019 15:31
Geography, 21.11.2019 15:31
Mathematics, 21.11.2019 15:31
Social Studies, 21.11.2019 15:31