The use of this machine is simple.

This computer can be used by anyone.

We will use phosphoric acid in this chemical experiment.

He is majoring in chemistry at university.

We conducted a new experiment in science class.

We will conduct a new chemistry experiment tomorrow.

He is an expert in chemistry.

I learned about the properties of phosphorous acid in chemistry class.

This bottle is reusable.

This fertilizer is rich in phosphates.