In order to find the empirical formula of this compound, you must first calculate the ratio of elements.

It is reported that North Korea has conducted another nuclear bomb test.

He is looking for a proving ground to test his new theory.

He conducted a thought experiment to solve a problem in physics.

He used a metal detector to search for treasure on the beach.

I started decluttering and decided to throw away unnecessary things.

I participate in the school's cross country race every year.

He achieved the 'all simples' yaku in mahjong.

He admitted that it is difficult to execute the plan, saying 'it is easier said than done.'

Well then, I'm off.