Density of water is 1 g/ mL . The concentration of water in mol / litre is ______.

Calculate the mass percentage composition of the elements in nitric acid (H=1 ,N=14, O=16) .

The sodium fusion extract of an organic compound is boiled with concentrated nitric acid , following by treatment with silver nitrate A white precipitate is obtained which is soluble in ammonium hy droxide . This test confirms the presence of _____.

Calculate the degree of dissociation and concentration of H_3O^+ ion in 0.01 M solution of formic acid K_a = 2.1 xx 10^(-4) at 298K.

Dissociation constant of acetic acid is 1.8 xx 10^(-5) . Calculate percent dissociation of acetic acid in 0.01 M solution.

In an experiment, 2.16 g of copper was dissolved in nitric acid followed by ignition of the nitrate, which gave2.70 g of copper oxide. In another experiment, 1.46 g of copper on heating in a current of air gave 1.83 g of copper oxide. The percentage of copper in copper oxide is______ and the above data illulstrate the law of _________.

Apparatus : Test tube, beakers, burner, etc. Chemicals : Glacial ethanoic acid, ethanol, concentrated sulphuric acid, etc. Procedure : Take 1 mL ethanol and 1 mL glacial ethanoic acid in a test tube. Add a few drops of concentrated sulphuric acid in it. Keeps this test tube in the beaker containing hot water (hot water bath) for five minutes. Then take 20-30 mL water in another beaker, and pour the above reaction mixture in it and smell it. What can you say about the smell of the reaction mixture?

A 1.000 mL sample of acetone, a common solvent used as a paint remover, was placed in a small bottle whose mass was known to be 38.0015 g. The following values were obtained when the acetone - filled bottle was weighed : 38.7798 g, 38.7795 g and 38.7801 g. How would you characterise the precision and accuracy of these measurements if the actual mass of the acetone was 0.7791 g ?

A 1.000 mL sample of acetone, a common solvent used as a paint remover, was placed in a small bottle whose mass was known to be 38.0015 g. The following values were obtained when the acetone filled bottle was weighed : 38.7798 g, 38.7795 g and 38.7801 g. How would you characterise the precision and accuracy of these measurements if the actual mass of the acetone was 0.7791 g ?

A domain in ferromagnetic iron is in the form of cube of side 1 µm. Estimate the number of iron atoms in the domain, maximum possible dipole moment and magnetisation of the domain. The molecular mass of iron is 55 g/mole and density is 7.9g//cm^(3) . Assume that each iron atom has a dipole moment of 9.27xx10^(-24)Am^(2) .