Some Basic Conc...

If $$1$$ L of $$O_2$$ at $$15^oC$$ and $$750$$ mm pressure contains $$\text N$$ molecules, the number of molecules in $$2$$ L of $$SO_2$$ under the same conditions of temperature and pressure will be :

Which of the following is the best thing to do during heavy lighting?

The percentage value of nitrogen in urea is about :

The weights of two elements which combines with one another are in the ratio of their:

Modern atomic mass scale is based on the mass of:

Insulin contains $$3.4$$% sulphur. The minimum molecular weight of insulin is :

A sample of $$H_{2}SO_{4}$$ contains $$3.2$$ kg of sulphur. The weight (in g) of hydrogen present in the sample is:

Percentage of Se in peroxidase anhydrous enzyme is $$0.5$$% by weight (At. wt. = $$78.4$$) then, minimum molecular weight of peroxidase anhydrous enzymes is :

A flask of methane $$(CH_4)$$ was weighed. Methane was then pushed out and the flask again weighed when filled with oxygen at the same temperature and pressure. The mass of oxygen would be :

The density of a salt solution is $$1.13 g cm^{-3}$$ and it contains $$18\%$$ of $$NaCI$$ by weight The volume of the solution containing $$36.0\ g$$ of the salt will be