chemical-aritmatic

Related Questions

• The amount of water that should be added to 500 ml of 0.5 N solution of $NaOH$to give a concentration of 10 mg per ml is

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• If ${N_A}$is Avogadro’s number then number of valence electrons in 4.2 g of nitride ions $({N^{3 - }})$

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• $KMn{O_4}$ reacts with oxalic acid according to the equation, $2MnO_4^ - + 5{C_2}O_4^{2 - } + 16{H^ + } \to 2M{n^{2 + }} + 10C{O_2} + 8{H_2}O$, here 20 ml of 0.1 M $KMn{O_4}$ is equivalent to

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• A sample of calcium carbonate $(CaC{O_3})$ has the following percentage composition : Ca = 40%; C = 12%; O = 48% If the law of constant proportions is true, then the weight of calcium in 4 g of a sample of calcium carbonate obtained from another source will be

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• One gram of hydrogen is found to combine with 80g of bromine one gram of calcium valency=2 combines with 4g of bromine the equivalent weight of calcium is

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