Answer key to Chemistry Lab Practice Test

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1.) 680 mmHg

2.) 213 kPa

3.) 2.42 x 10²² molecules

4.) C₂N₂

5.) 2.16 atm

6.) SF₆ , HI, C₁₂, H₂S, CO

7.) 2 Sc (s) + 6 HCl (aq) ---> 3 H₂ (g) + 2 ScC₁₃ (aq)

8.) 2 Hg(NO₃)₂ ---> 2 HgO (s) + 4 NO₂ (g) + O₂ (g)

9.) 3 H₂S (g) + Fe(OH)₃ (s) ---> FeS₃ (s) + 3 H₂O (l)

10.) zinc: 35% , nitrogen: 15% , oxygen: 50%