His house is very big.

The length of this molecule is about 1 angstrom.

The size of this molecule is a few angstroms.

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.

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

Understanding numbers is important for solving math problems.

He was bedridden with illness for several days.

What is the molecular formula of this compound?