Calculate the molarity of water if its density is 100 kg/m3
Molarity of water means number of moles of water in 1 litre of water
1 L of water = 1000 cm3 = 1000 g
∴ Molarity of water = 55.56 mol/L.
The mass of precious stones is expressed in terms of ‘carat’. Given that 1 caret = 3.168 grains and 1 grams = 15.4 grains, calculate the total mass of a ring in grams and kilograms which contains 0.500 carat diamond and 7.00 grams gold.
4.90 g of KClO3 when heated produced 1.92 g of oxygen and the residue (KCl) left behind weight 2.96 g. Show that these results illustrate the law of conservation of mass.
Chlorine has two isotopes of atomic mass units 34.97 and 36.97. The relative abundances of these two isotopes are 0.755 and 0.245 respectively. Find the average atomic mass of chlorine.
Calculate the molecular mass of glucose (C6H12O6)molecule.
A solution is prepared by adding 2 g of a substance A to 18 g of water. Calculate the mass percent of the solute.
The density of 3 M solution of NaCl is 1.25 g mL–1. Calculate the molalityof the solution.
How many grams of NaOH should be dissolved to make 100 cm–3 of 0.15 M NaOH solution?
Calculate the number of oxalic acid molecules in 100mL of 0.02 N oxalic acid solution.
Calculate the percentage of cation in ammonium dichromate.
Calculate the percentage of water of crystallisation in the sample of blue vitriol (CuSO4.5H2O)