A molecule of ammonia gas is represented as NH2.
Which of the following exists as molecules?
(i) Oxygen gas
(ii) Argon
(iii) Ammonia
(iv) Helium
(v) Water
(vi) Sugar
Try to represent the statements given below as chemical equations.
(a) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.
(b) Hydrogen gas combines with nitrogen to form ammonia.