what is the chemical formula for this molecule? complete the formula below:

Explanation:

Step1: Identify and count Carbon atoms

The key indicates dark grey spheres are Carbon (C). Count the dark grey spheres in the model. $$ \text{Number of Carbon atoms} = 2 $$

Step2: Identify and count Hydrogen atoms

The key indicates light grey spheres are Hydrogen (H). Count the light grey spheres in the model. $$ \text{Number of Hydrogen atoms} = 6 $$

Step3: Write the chemical formula

Combine the element symbols and their counts as subscripts to form the chemical formula. $$ \text{Chemical Formula} = C_2H_6 $$

Answer:

$C_2H_6$