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The mass of a solid copper penny is 5.43 g. How many copper atoms are in the penny?
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Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?
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What metric units would you use to measure the thickness of a key
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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 mass of a solid copper penny is 5.43 g. How many copper atoms are in the penny?...
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