chemical-aritmatic

Related Questions

• 250 ml of a sodium carbonate solution contains 2.65 grams of $N{a_2}C{O_3}$. If 10 ml of this solution is diluted to one litre, what is the concentration of the resultant solution (mol. wt. of $N{a_2}C{O_3}$=106)

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• 100 ml of 0.1 N hypo decolourised iodine by the addition of $x$ g of crystalline copper sulphate to excess of KI. The value of $‘x’$ is (molecular wt. of $CuS{O_4}.5{H_2}O$is 250)

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• Number of molecules in 100 ml of each of ${O_2},\,N{H_3}{\rm{ and}}\,C{O_2}$at STP are

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• $1.5$ mol of ${O_2}$ combine with $Mg$ to form oxide. The mass of $Mg$ (at. mass 24) that has combined is

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• ${H_2}$ evolved at STP on complete reaction of 27 g of Aluminium with excess of aqueous $NaOH$ would be

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