 
			 
			MCQOPTIONS
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				| 1. | Roasting HgS in the presence of oxygen produces the free metal and . What is the coefficient of HgS when the equation for this reaction is completed and balanced? | 
| A. | 2 | 
| B. | 1 | 
| C. | 5 | 
| D. | 3 | 
| Answer» C. 5 | |