A mixture-of 1.5 gm calcium carbonate and magnesium carbonate is strongly heated form 360 ml of carbondioxide at S.T.P. calcualte the percentage composition of the mixture. [C = 12, M = 24]

1.5g of a mixture of CaCO_(3) and MgCO_(3) , on ignition, produces 360mL of CO_(2) at STP. Calculate the percentage composition of the mixture.

2.5 g of an inpure sample of sodium bicarbonate when strongly heated gave 300ml of carbondioxide measured at 27^(@) and 760 mm pressure. Calculate the percentage purity of the sample. (Na=23, C=12, O=16).

1.84 g of a mixture of CaCO_(3) and MgCO_(3) was heated to a constant weight. The constant weight of the residue was found to be 0.96g. Calculate the percentage composition of the mixture. (relative atomic masses of Ca and Mg are 40 and 24 respectively).

5.249g of metallic carbonate on being strongly heated liberates 1309.28 mL of CO_(2) at 27^(@)C annd 755 mm pressure of Hg. Find the equivalent mass of the metal.

1.224g of a metallic carbonate on being strongly heated liberates 1309.28 mL of CO_(2) at 27^(@)C and 750 mm pressure of Hg. Find the equivalent mass of the metal carbonate.

0.2g of an organic compound contain 40.67% of carbon, 8.47% of hydrogen, 37.96 mL of nitrogen are obtained at S.T.P. from the same amount of the compound. Find out the empirical formula of the compound

A mixture containing 1.12 litre of H^2 and 1.12 litre of D^2 (deuterium) at STP is taken inside a bulb connected to another bulb by a stop-cock wilh a small opening. The second bulb is fully evacuated, the stop-cock is opened for a certain time and then closed. The first bulb is found to contain 0.05 g of H^2 . Determine the percentage composition by mass of the gases in the second bulb.

A gas-mixture having 1200 mL volumea t 27^(@)C and 1 atm pressure consists of 80% of methane % 20% of CO. what amount of KClO_(3) on thermal decomposition produces the same quantity off oxygen as needed for complete combustion of the mixture?

5 mL of a gas composed of hydrogen and carbon is mixed with 30 mL of oxygen and exploded with electric sparking. The volume of the gas mixture, obtained by explosion is found to be 25 mL. KOH is then addded to the mixture and as a result, its volume is reduced to 15 mL. the residual gas is purely oxygen. all volumes have been measured at STP. what is the molecular formula of the gas?

Column I, Column II A circular plate is expanded by heat from radius 6 cm to 6.06 cm. Approximate increase in the area is, p. 5 If an edge of a cube increases by 2%, then the percentage increase in the volume is, q. 0.72 pi If the rate of decrease of (x^2)/2-2x+5 is thrice the rate of decrease of x , then x is equal to (rate of decrease in nonzero)., r. 6 The rate of increase in the area of an equailateral triangle of side 30c m , when each side increases at the rate of 0. 1c m//s , is, s. (3sqrt(3))/2