What volume at N.T.P of ammonia gas will be required to be passed into 30mL of N H2SO4 solution to bring down the acid normality to 0.2 N?
Normality is the number of milliequivalents (mgq) per mL.,
(âˆµAcid and base react with each other in equivalent amounts)
But 1 mole of NH3 = 1 g eq, i.e., 1000 meq of NH3 = 22400 mL at N.T.P
80 g of oxygen contain as many atoms as in
A black dot used as a full stop at the end of a sentence has a mass of about one attogram. Assuming that the dot is made up of carbon, calculate the approximate number of carbon atoms presents in the dot?
Insulin contains 3.4% sulphur. Calculate the minimum molecular mass of insulin.
atoms of iron weigh as much as 1cc of H2 at S.T.P. What is the atomic mass of iron?
4 g carbon were heated with 8 g of sulphur. How much carbon disulphide (CS2) will be formed when the reaction is completed? What will be its percentage purity?
How many years would it take to spend Avogadro’s number of rupees at the rate of 10 lakh rupees per second?
Gastric juice contains about 3.0 g of HCl per litre. If a person produces about 2.5litre of gastric juice per day, how many antacid tablets each containing 400 mg of Al(OH)3 are needed to neutralize all the HCl produced in one day.
The vapour density of a mixture of NO2 and N2O4 is 38.3 at 26.7oC. Calculate the number of moles of NO2 in 100 g of the mixture.
The mass of one litre sample of ozonised oxygen at N.T.P was found to be 1.5 g. when 100mL of this mixture at N.T.P were treated with turpentine oil, the volume was reduced to 90mL
Calculated the molecular mass of ozone.
7.4 gram of a metal hydroxide on heating gives 5.6 g of metal oxide. Calculate the equivalent weight of the metal.