Some Basic Conc...

The percentage loss in weight after heating a pure sample of potassium chlorate (mol. $$wt.=122.5$$) will be:

The carbonate of a metal is isomorphous with $$MgCO_{3}$$ and contains $$6.091\%$$ of carbon. Atomic weight of the metal is nearly:

$$10\ { dm }^{ 3 }$$ of $${ N }_{ 2 }$$ gas and $$10\ { dm }^{ 3 }$$ of gas X at the same temperature contain the same number of molecules. The gas X is

If  $$N _ { A }$$ is Avogadro's number, then calculate the number of electrons in  $$4.2\ g$$  of  $$N ^ { 3- }$$.

A solution containing  $$500 g$$  of a protein per litre is isotonic with a solution containing  $$3.42 g$$  of sucrose per litre. The molecular mass of protein is:

The Statue of Liberty is made of $$2.0\times 10^5$$ lbs of copper sheets bolted to a framework $$(1 lb =454 g)$$. How many atoms of copper are there on the statue?

The weight of $$H_{2}C_{2}O_{4},2H_{2}O$$ required to prepare 500 ml of 0.2 N solution is:

Number of $$HCl$$ molecules present in $$10$$ mL of $$0.1 N$$ $$HCl$$ solution is 

One gram molecule of any gas at $$NTP$$ occupies $$22.4\ L$$. This fact was derived from:

A compound contains $$28\%$$ Nitrogen, by mass. The possible molecular mass of the compounds is/are?