Molarity based on vol. Of solvent in 100litre of solu. While normality is gram molecular mass
50 mL of 0.5 M oxalic acid is needed to neutralize 25 mL of sodium hydroxide solution. The amount of in 50 mL of the given sodium hydroxide solution is :
0.27 g of a long chain fatty acid was dissolved in 100 cm3 of hexane. 10 mL of this solution was added dropwise to the surface of water in a round watch glass. Hexane evaporates and a monolayer is formed. The distance from edge to centre of the watch glass is 10 cm. What is the height of the monolayer?
[Density of fatty acid=0.9 g cm-3 , ]
The strength of 11.2 volume solution of is [ Given that molar mass of H=1 g mol-1 and O=16 g mol-1]
For a reaction,
identify dihydrogen as a limiting reagent in the following reaction mixtures.
At 300 K and 1 atmsopheric pressure, 10 mL of a hydrocarbon required 55 mL of
for complete combustion, and 40 mL of is formed. The formula of the hydrocarbon is:
of weigh and of weigh The molar mass of and molar mass of in are :
The mole fraction of a solvent in aqueous solution of a solute is The molality of the aqueous solution is :
The minimum amount of consumed per gram of reactant is for the reaction :
(Given atomic mass :, )
25g of an unknown hydrocarbon upon burning produces 88 g of and 9 g of . This unknown hydrocarbon contains:
20 g of carbon and 5 g of hydrogen
22 g of carbon and 3 g of hydrogen
24 g of carbon and 1 g of hydrogen
18 g of carbon and 7 g of hydrogen
What would be the molality of (mass/mass) aqueous solution of KI?
( molar mass of KI = )
of surfactant solution forms a monolayer covering on a polar substrate . If the polar head is approximated as a cube , what is its edge length ?
The percentage composition of carbon by mole in methane is:
In order to oxidise a mixture of one mole of each of and in acidic medium, the number of moles of required is :
Calculate the percentage composition in terms of mass of solution abtained by mixing 400g of 25% soln and 300g of 30% of soln?