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List four observations that indicate that a chemical reaction may be taking place
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Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.
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Solid magnesium sulfide has the same kind of crystal structure as NaCl which is pictured below: If t...
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