In a class, a teacher asked students to write the molecular formula of oxygen. Shamita wrote the formula as `O_2`, and Priyanka as O. Which one is correct? State the reason.

In a class, a teacher asked students to write the molecular formula of oxygen Shamita wrote the formula as O2 and Priyanka as O. which one is correct? State the reason. (AS-1)

In a class, a teacher asked students to write the molecular formula of oxygen Shamita wrote the formula as O2 and Priyanka as O. which one is correct? State the reason. (AS-1)

Molecular formula of water is H_2O_2 .

Write the structural formula of N_2O_5 .

Write the empirical formula of the compounds having the molecular formulas : H2O2

Write the empirical formula of the compounds having the molecular formulas : N2O4

Write the empirical formula of the compounds having the molecular formulas : N2O5

Write the empirical formula of each one of the following: H_(2O_(2)

Anitha wrote the formula for oxygen molecule as 2O. Is it correct or not? Why?