Which two formulas represent compounds? A. Ag B. NaCl C. HCI D. H2

NaCl

Explanation:

This is the only one that is made of 2 different types of elements, Na and Cl, so it is a compound.

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if the concentration of products is decreased, the equilibrium will shift toward the products). add an inert gas (one that is not involved in the reaction) to the constant-volume reaction mixture: this will increase the total pressure of the system, but will have no effect on the equilibrium condition.

explanation:

the answer is either b or c