Some Basic Conc...

Assertion : 20 gm of argon (atomic mass of Ar $$=40)$$ occupies volume of $$22400\ cm^3$$ at STP.
Reason : 20 gm of Neon (atomic mass of $$Ne=20$$) occupies a volume of $$22400\ cm^3$$ at STP.

The volume occupied by half a mole of a gas at STP is:

Ethane burning in oxygen to give carbon dioxide and steam. The volume ratio of reactants to products is ______________.

What is the mass of one atom of $$C-12$$ in grams?

A neutral atom of an element has a nucleus with a nuclear charge 13 times and mass 27 times that of hydrogen nucleus. What is the ratio of electrons to protons in its stable positively charged ion?

Barium chloride reacts with sodium sulphate to form Barium sulphate and sodium chloride. Then, according to the law of conservation of mass:

Which law states that the total mass of the reactants is equal to the total mass of the products in a chemical reaction?

One a.m.u. or one 'u' is equal to :

The modern atomic mass unit is based on the mass of :

If the fertilizers listed below are priced according to their nitrogen content, which will be the least expensive per $$50$$ kg bag?