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An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.
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The rate constant for the reaction below is 6.2 x 10β5 mol lβ1 s β1. if the initial concentration of a is 0.0500 m, what is its concentration after 115 s?
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What is a polar and non-polar molecules?...
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