A welding fuel gas cointains carbon and hydrogen only .Burning a small sample of it in oxygen gives 3.38 g of carbon dioxide. 0.690 g of water and no other products. A volume of 10.0L(measured at S.T.P) of this welding gas is found to weight 11.6 g. Calculate molecular formula

In a reaction ,5.3g of sodium carbonate reacted with 6g of ethanoic acid. The product were 2.2 g of carbon dioxide,0.9g water and 8.2g sodium ethanoate. Show that these observation are in agrement with the law of conservation of mass. Sodium carbonate + ethanoic acid rarr sodium ethanoate + carbon dioxde + water.

A gaseous compound is composed of 85.7% by mass carbon and 14.3% by mass hydrogen. Its density is 2.28 g/litre at 300 K and 1.0 atm pressure. Determine the molecular formula of the compound.

At 1 atm and 273 K the volume of nitrogen gas required to cover a sample of silica gel, assuming Langmuir monolayer adsorption , is found to be 1.30 cm^(3)g^(-1) of the gel. The area occupied by a nitrogen molecule is 0.16nm^(2) . Find out the no. of surface sites occupied per molecule of N_(2) . 5.568 m^(2)g^(-1) , 3.34 m^(2) g^(-1) , 1.6 m^(2) g^(-1) , none of these .

Dry ice is solid carbon dioxide. A 0.050 g sample of dry ice is placed in an evacuated 4.6 L vessel at 30^(@)C . Calculate the pressure inside the vessel after all the dry has been converted to CO_(2) gas.

A definite amount of solid NH_(4)HS is placed in a flask already containing ammonia gas at a certain temperature and 0.1 atm pressure. NH_(4)HS decompses to give NH_(3) and H_(2)S and at equilibrium total pressure in flask is 1.1 atm. If the equilibrium constant K_(P) for the reaction NH_(4)HS(s) iff NH_(3)(g)+H_(2)S(g) is represented as zxx10^(-1) then find the value of z.

6.2g of a sample containing Na_2CO_3, NaHCO_3 and non-volatile inert impurity on gentle heating loses 5% of its mass due to reaction 2NaHCO_3 rarr Na_2 CO_3 + H_2 O + CO_2 . Residue is dissolved in water and formed 100mL solution and its 10mL portion requires 7.5 mL of 0.2M aqueous solution of BaCI_2 for complete precipitation of carbonates. Determine mass (in gram) of Na_2 CO_3 in the original sample.

P_4O_6 reacts with water according to equation: P_4O_6+ 6H_2O rarr 4H_3PO_3 Calculate the volume of 0.1 M NaOH solution required to neutralise the acid formed by dissolving 1.1 g of P_4O_6 in H_2O .

The decomposition of N_2O_5 in carbon tetrachloride Solution has been found to be first order With respect to N_2O_5 with rate constant, k = 6.2 xx10^-4 s^-1 N_2O_5 (solution) rarr 2NO_2 (solution) +1//2 O_2 (g) Calculate the rate of the reaction when [N_2O_5]= 0.50 mol L^-1