Chemistry
Common element in glass, cement, quartz
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Avogadro’s number represents__________?
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1 amu equals__________?
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Isotopes differ in__________?
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Percentage of calcium in CaCO3 is__________?
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The volume of 2.8 g N2 at STP is__________?
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One mole of CO2 contains__________?
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Molecular mass of water (18 g) means__________?
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Empirical formula of chloroform is__________?
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