Here's how to determine the formula for an alkane with 100 hydrogens:

Understanding Alkanes

* General Formula: Alkanes follow the general formula C_nH_2n+2, where 'n' represents the number of carbon atoms.

* Structure: Alkanes are hydrocarbons with only single bonds between carbon atoms.

Solving for the Formula

1. Hydrogen Count: We know the alkane has 100 hydrogens (H₁₀₀).

2. Set up the Equation: Substitute the hydrogen count into the general formula:

C_nH_2n+2 = C_nH₁₀₀

3. Solve for 'n':

2n + 2 = 100

2n = 98

n = 49

4. Complete Formula: The alkane with 100 hydrogens has 49 carbon atoms. Therefore, the formula is C₄₉H₁₀₀.

Note: This alkane would be a very large and complex molecule!