Complete the sentences with the correct form of the verbs in brackets. 1. The water (having used/ using/ used) matched all the requirements for the oxygen content.

Complete the sentences with the correct form of the verbs in brackets.

1. The water (having used/ using/ used) matched all the requirements for the oxygen content.

2. Concentrated sulphuric acid is a weaker (oxidized/ oxidizing/ being oxidized) agent than nitric acid but is still a powerful dehydrating agent.

3. Molecular bonding and structure play a central role in (being determined/ determining/ having determined) the course of chemical reactions.

4.  (Finishing/ Being finished/ Having finished) their work, they left the lab.

5. The treatment (describing/ having described / described) increased corrosion resistance.

6. (Being/ Having been) the lightest of four elements, hydrogen’s density is the smallest.

7. The formula of a compound (having known/ being known/ knowing), we can calculate its molecular weight.

8.  (Having heated/ Heating/ Being heated) an object increases its nuclear and atomic energy.