How much grams fo NaCI is needed for making 2 molar solution (NaCI-58.5). W h-at is the amount of water needed for this?

How much BaCl_2 would be needed to make 250mL of a solution having same concentration of Cl^(-) as the one containing 3.78 g of NaCl per 100 mL?

The molarity fo 250 mI of Na_2CO_3 solution is 0.5M. Find the mass of Na_3CO_3 .

Energy required for excitation of electron in 1 mole H atom from ground state to 3^(rd) excited state is 2.67 times (lesser than) dissociation energy per mole of H_(2(g)) . Calculate the amount of energy needed to excite each H atom of H_(2(g)) confined in 1 L at 27^(@)C and 1 bar pressure. (R=0.083 bar litre K^(-1)" mol"^(-1), R_(B)=1.1xx10^(-7) m^(-1) ).

You are requested to make20 moles of NaCl into packets of 100g each.(Hint:Molecular mass of NaCI is58.5): Is there any NaCI remaining? If so, how much?

1 (1)/(2) litres of water is needed to fill (3)/(4) of a can. How much water is needed to fill it completely?

How much water should be added to '300 mL' of 0.5 M NaOH solution so as fo prepare a solution of 0.2 M?

A standard solution of K_(2)Cr_(2)O_(7) (mol. Mass 294) contains 2.94 g dissolved to make 250 ml solution 20 ml of this solution with excess of 5% Kl solution liberate iodine which when titrated with Na_(2)S_(2)O_(3) solutioin using starch indicator changes blue colour to colourless just at the addition of 18 ml Na_(2)S_(2)O_(3) solution. The average oxidation number of sulphur in the product of titration and the molarity of Na_(2)S_(2)O_(3) are

One equivalent of an acid reacts completely with one equivalent of a base in dilute solution. a) Which type reaction is this? b) HCI+NaOH rightarrow NaCI+ H_2O On the basis of above equation, explain enthalpy of neutralisation.

10 (1)/(2) kilograms of sugar is to be packed in (2)/(5) kilogram bags. How many bags. do we need? What is the weight of the remaining sugar?