Insulin contains 3.4% sulphur. What will be the minimum molecular weight of insulin?
For minimum molecular mass, there must be one S atom per insulin molecule.
If 3.4 g S is present, the molecular mass = 100
If 32 g S is present, the molecular mass
276 g of silver carbonate on being strongly heated yields a residue weighing
An organic compound contains 20.0% C, 6.66% H, 47.33% N and the rest was oxygen. Its molar mass is 60 g . The molecular formula of the compound is
In the following reaction,
2 mol MnO2 reacts with 4 mol of HCl to form 11.2 L at STP. Thus, per cent yield of is
In Kjeldahl’s method, nitrogen present is estimated as :
Two elements X (at. wt. 75) and Y (at. wt.16) combine to give a compound having 75.8% of X. the formula of compound will be
One atom of an element weighs Its atomic mass is
In the following reaction, which choice has value twice that of the equivalent mass of the oxidising agent?
Arsenic forms two oxides, one of which contains 65.2% and the other 75.7% of the element. Hence, equivalent masses of arsenic are in the ratio
The equivalent mass of chlorine is 35.5 and the atomic mass of copper is 63.5. The equivalent mass of copper chloride is 99.0. Hence, formula of copper chloride is