Question

drag and drop the correct molecular formula to match it with each molecule.

Explanation:

Step1: Identify first molecule

The first molecule has one nitrogen (N) atom and three hydrogen (H) atoms.

Step2: Determine formula

The molecular formula for a molecule with one N and three H is $NH_3$.

Step3: Identify second molecule

The second molecule has one oxygen (O) atom and two hydrogen (H) atoms.

Step4: Determine formula

The molecular formula for a molecule with one O and two H is $H_2O$.

Answer:

First molecule: $NH_3$
Second molecule: $H_2O$