What is mole?

What is momentum ? What is its unit ?

What is colligative property? Show that this property is proportional to the mole fraction of the solid solute.

What is a polysome? What is its function?

What is volume charge density? What is its unit?

What is meant by power of a lens? What is its unit?

The atomic mass of sodium is 23 u. What is the number of moles in 46 g sodium?

What is the mass of 0.2 mole of oxygen atoms?

What is the mass of 0.5 mole of water molecules?