Some Basic Conc...

Two beakers $$A$$ and $$B$$ present in a closed vessel. Beaker $$A$$ contains $$152.4\:g$$ aqueous solution of urea, containing  $$12\:g$$ of urea. Beaker $$B$$ contains $$196.2\:g$$ glucose solution, containing $$18\:g$$ of glucose. Both the solutions allowed to attain the equilibrium. Determine weight $$\%$$ of glucose in its solution is at equilibrium.

The molality of $$1$$ L solution with $$x\%$$ $$H_2SO_4$$ is $$9$$. The weight of the solvent present in the solution is $$910$$ g. The value of $$x$$ is:

$$\displaystyle n_{1}$$ g of substance X reacts with $$\displaystyle n_{2}$$ g of substance Y to form $$\displaystyle m_{1}$$ g of substance R and $$\displaystyle m_{2}$$ g of substance of S. This reaction can be represented as $$X + Y \rightarrow R + S$$. The relation which can be established in the amounts of the reactants and the products will be :

$$Na_2SO_4. \:xH_2O$$ has $$50\%$$ $$H_2O$$. Hence, $$x$$ is :

Cortisone is a molecular substance containing $$21$$ atoms of carbon per molecule. The mass percentage of carbon in cortisone is $$69.98$$%. Its molar mass is:

The sodium salt of methyl orange has $$7\%$$ sodium. What is the minimum molecular weight of the compound?

Mole fraction of ethanol and water mixture is $$0.25$$. Hence, percentage concentration of ethanol by weight of mixture is:

A spherical ball of radius $$7$$ cm contains $$56\%$$ iron. If density is $$1.4$$ g/cc, the number of moles of $$Fe$$ present approximately is :

Which of the following is a suitable example for illustrating the law of conservation of mass?

A salt is formed due to the reaction between an oxy acid containing chlorine and a base containing a monovalent metal of atomic mass $$x$$. The number of oxygen atoms in one molecule of the acid is more than the corresponding 'ic' acid. Calculate the molecular mass of the salt.