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Is changing the color of the coin from copper to silver a physical or chemical change?
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Given that 1 mi = 1760 yd, determine what conver- sion factor is appropriate to convert 1849 yd to miles; to convert 2.781 mi to yards.
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In an exothermic reaction at equilibrium, what is the effect of lowering the temperature? a. the reaction makes more products. b. the reaction makes more reactants. c. the reaction is unchanged.
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What is the best describtion of the side of the moon that faces earth?
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Is changing the color of the coin from copper to silver a physical or chemical change?...
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