The hydrated salt, Na2SO4.nH2O undergoes 55.9% loss in weight on heating and becomes anhydrous. The value of n will be?

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Haemoglobin contains 0.33% of Iron by weight. The molecular weight of it is approx. 67200. The numbers of iron atoms (Atomic wt of Fe=56 u) present in one molecule of Haemoglobin are?

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What is the % composition of each element in (Mg(OH)2) magnesium hydroxide?

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Calculate the percent Nitrogen in Dinitrogen (N2O) Monoxide?

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A piece of Cu contains 6.022 x10^24 atoms. How many mole of Cu does it contain?