Bob J.

asked • 05/30/20

what would the right answer be

Gold dissolves in the acid mixture known as aqua regia according to the following balanced reaction:
Au + HNO3 + 3 HCl --> AuCl3 + NO + 2H2O

If 1.25mg of gold can dissolve what mass of Hydrochloric acid will also be reacted to completely dissolve this gold.

A

7.72 X 10-5 g HCl

B

3.75 mg HCl

C

6.95 X 10 -4 g HCl

D

0.6947 g HCl


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