Core Concepts Composition of Air Gas Tests Metal and Acids

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Across

1. This gas relights a glowing splint

6. This gas is 1% of the atmosphere

9. phosphorous and iron can be used to determine the percentage of oxygen in air when the react with ___________.

11. Magnesium reacts with this acid to form magnesium chloride

13. This poisonous group7 gas will bleach litmus paper

14. This type of decomposition reaction requires heat

15. This gas is 79% of the atmosphere.

Down

2. The acid used to make sodium nitrate

3. The acid used to make calcium sulfate

4. This is the chemical name for limewater

5. This has the formula CO2

7. Carbon dioxide is responsible for this environmental problem

8. When hydrogen undergoes combustion it forms ________

10. The salt fromed when iron reacts with sulfuric acid

11. This gas produces a squeaky pop when a lit splint is held to it

12. This group of compounds will produce carbon dioxide gas when heated

13. Limewater turns _____________ when CO2 gas is passed through it

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