Chemistry, 17.10.2019 16:30 demeckoferguson
Which one of the following statements is true? both chemical and physical changes can involve a change in appearance. neither chemical nor physical changes involve a change in appearance. only physical changes involve a change in appearance. only chemical changes involve a change in appearance.
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Which substance absorbs 58.16 kj of energy when 3.11 mol vaporizes? a)ch4 b)h2s c)co2 d)nacl
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The identities of substances are the same before and after which type of change
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Which one of the following statements is true? both chemical and physical changes can involve a cha...
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