1.
Calculate the mass of 0.5 mole of N atoms
5.
What is the symbol of cobalt?
7.
Which of the following contains maximum number of molecules?
8.
Which of the following would weigh the highest?
9.
A change in the physical state can be brought about:
10.
What is the mass of 1 mole of nitrogen atoms.
11.
Which of the following statement is not true about an atom?
12.
Mass of one atom of oxygen is:
13.
What is the symbol of helium?
14.
The chemical symbol for nitrogen gas is:
22.
A change in the physical state can be brought about:
24.
What is the mass of 0.5 mole of water molecules?
25.
The chemical symbol for sodium is:
30.
Which of the following has maximum number of atoms?