What are the rules you have to follow while writing a chemical formula?

What is a chemical formula?

What are the norms to be followed while writing scientific names?

Your friend told a formula to you as 1/f = (n - 1) (1/R_1-1/R_2),1/f=1/v-1/u then he put the following questions. What are the precautions that you have to take while using these formulae ?

What is calgon ? Give its chemical formula

How do you write a chemical equation?

how do you write a chemical equation?

What do you have to observe while purchasing packed foods?

The values that are useful in writing chemical formulae and in calculation of oxidation states are

Write the chemical formulae of the following: acetic acid