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What is the number of valence electrons in a calcium atom? * 8 2 18 20
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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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Displacement is the slope of a velocity vs. time graph a. true b. false
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What is the number of valence electrons in a calcium atom? * 8 2 18 20...
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