Chemistry, 26.11.2019 00:31 ShelleyPSeliger
Melting, boiling, and bending are considered physical changes, but burning is a chemical change. explain why this is so.
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Chemistry, 21.06.2019 22:30
Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.
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Chemistry, 22.06.2019 19:20
15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.
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Chemistry, 23.06.2019 04:30
Two liquids are poured into a beaker. after a few seconds, the beaker becomes warm. which of the following best describes this reaction? a. an exothermic reaction b. a decomposition reaction c. an endothermic reaction d. a single-displacement reaction
Answers: 1
Chemistry, 23.06.2019 05:50
Aseismic wave is energy released as the result of rock movement along a fault. t or f ?
Answers: 1
Melting, boiling, and bending are considered physical changes, but burning is a chemical change. exp...
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