Atoms and Molec...

$$1.2\, \times\, 10^{24}$$ atoms of iron weighs  ______ grams.

All samples of carbon dioxide contain carbon and oxygen in the mass ratio of $$3 : 8$$. This is in agreement with the law of :

An element A (atomic weight $$=12$$) and B (atomic weight $$=35.5$$) combines to form a compound X. If $$4$$ mol of B combines with $$1$$ mol of A to give $$1$$ mol of X. The weight of $$1$$ mol of X would be :

Atomic mass of an element is:

Law of conservation of mass was put forward by :

A compound was found to contain $$5.37\ \%$$ of Nitrogen. What is the minimum molecular weight of the compound?

An organic compound contains $$4$$% sulphur. Its minimum molecular weight is :

Which of the following options contains only elements?

The smallest particle of a substance (element or compound) which has the properties of that substance and can exist independently is called a ..............

Which of the following is true for the molecules of gases?