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Chemistry, 22.06.2019 08:00
Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.
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Chemistry, 22.06.2019 22:30
Which process describes vaporization that takes place below the surface of a liquid? condensation melting boiling evaporation
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Chemistry, 23.06.2019 00:00
Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3
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Chemistry, 23.06.2019 00:30
Arrange the elements in order of increasing electronegativity. use the periodic table to you arrange the elements. p o k mg
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Determine the chemical formula for the compound, chromate(iii). a) k3[cr(nh2ch2ch2nh2)3] b) [k(nh2c...
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