교과서 질문
If the atomic weight of an element is x, what is the mass in grams of 3.17 * 1020 atoms of the element?
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1:26분서술형 질문
How many moles are in 2.5 g of N2? 0.089 moles, 0.18 moles, 1.3 moles, 11 moles
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