Chemistry, 28.08.2019 15:20 Packergood
In becquerel’s initial experiment, in which he exposed uranium salt crystals to sunlight, the photographic paper became exposed even though it was shaded from the sun by a dark cloth. at first, how did becquerel explain this result? the black cloth emitted gamma rays that exposed the film. the sun emitted gamma rays that exposed the film. the crystals emitted x-rays when they were exposed to light, exposing the film. the crystals phosphoresced when they were exposed to light, exposing the film.
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Chemistry, 21.06.2019 17:30
Aspirin has a density of 1.40 g/cm3 what is the volume in cubic centimeters of a tablet weighing 320 mg ?
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Chemistry, 21.06.2019 22:30
Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.
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Chemistry, 22.06.2019 12:50
What is the chemical name of the compound na2co3? use the list of polyatomic ions and the periodic table to you answer. a. sodium carbon oxide b. sodium carbonate c. sodium(ll) carbonate d. sodium oxalate
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In becquerel’s initial experiment, in which he exposed uranium salt crystals to sunlight, the photog...
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