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State one important difference between a physical change and a chemical change?
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How many moles of potassium are needed to react completely with 12.8 moles of magnessium bromide?
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Which of the following describes qualitative data? a) recording the temperature of a solid as it is warmed. b) noting the color of a solution as it is heated. c) measuring the volume of an object by water displacement. d) taking the mass of an object using a balance.
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Write the formula for the binary compound iron (III) oxide. (a)FeO , (b)Fe(III)O (c),Fe3O2 ,(d)Fe2O3...
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