Express the number appearing in the following statements in standard form:

**(i)** The mass of a proton is 0.000000000000000000000001673 gram.

**(ii)** The thickness of a piece of paper is 0.0016 cm.

**(iii) **The diameter of a wire on a computer chip is 0.000003 m.

**(iv) **A helium atom has a diameter of 22/100000000000 m.

**(v)** Mass of a molecule of hydrogen gas is about 0.00000000000000000000334 tons.

**(vi)** The human body has 1 trillion cells which vary in shapes and sizes.

**(vii)** The distance from the Earth of the Sun is 149,600,000,000 m.

**(viii) **The speed of light is 300,000,000 m/sec.

**(ix)** Mass of the Earth is 5,970,000,000,000,000,000,000,000 kg.

**(x)** Express 3 years in seconds.

**(xi) **Express 7 hectares in cm^{2}.

**(xii) **A sugar factory has annual sales of 3 billion 720 million kilograms of sugar.