What is molecule? and what is the molecular formulae?

molecule is a group of atom .Molecular formula is the presentation of symbols of a molecules in  a systematic way.

Explanation:

For eg ; O is the 1 atom of oxygen and HCl is the molecules of hydrochroric acid.

     Examples of the molecular formula;

   hydrogen + chroride =hydrogenchroride

= 2H + 2Cl =2HCl

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

the formula for the conversion of temperature from degree celsius to kelvin is:

the sample of water at is converted to kelvin temperature by using the above formula as:

on comparing the two samples of water at or we can say that at and at respectively. the difference between the temperatures of two samples of water is:

hence, one can say that the sample of water at is greater than the sample of water at by .