`2xx10^(8)` atoms of carbon are arranged side by side. Calculate the radius of carbon atom if the length of this arrange is 2.4 cm.

Let's calculate mentally and write. If the area of a square is 4 sq. cm. then length of its sides is .....cm.

A gold atom, on average is 16.4 times as massive as the standard carbon atom. Find the atomic mass of gold atom in amu & kg.

Construct an isosceles triangle , each of whose equal sides is 10 cm and the length of unequal third side is 8 cm .

Find the mass of Nitrogen atom equal to the number of Carbon atoms in CO_2

(1) The energy associated with the first orbit in the hydrogen atom is -2.18xx10^(-18)J*"atom"^(-1) . What is the energy associated with the fifth orbit? (2) Calculate the radius of Bohr's fifth orbit for hydrogen atom.

In three moles of ethane (C_2H_6) calculate : Number of moles of carbon atoms

The correct arrangement of the species in the decreasing order of the bond length between carbon and oxygen in them is

The diameter of zinc atom is 2.6 Å. Calculate (1) radius of zinc atom in pm and (2) number of atoms present in a length of 1.6 cm if the zinc atoms are arranged side by side lengthwise.