His house is very big.

The size of this molecule is a few angstroms.

The length of this molecule is about 1 angstrom.

Each element of this set has a unique characteristic.

He is a 'big friend', an adult fan of that anime.

He solved a large number of problems.

Understanding numbers is important for solving math problems.

He was bedridden with illness for several days.

I can't solve this problem because there are too many numbers.

What is the molecular formula of this compound?