Question

Which substance has a coefficient of 2 when you balance the equation for this redox reaction? Copper solid plus nitric acid aqueous yields copper(II) nitrate aqueous plus nitrogen monoxide gas plus water liquid.

a. Copper
b. Nitric acid
c. Copper(II) nitrate
d. Nitrogen monoxide

Answer 1

The substance that has a coefficient of 2 when you balance the equation for this redox reaction is nitrogen monoxide (d).

Step-by-step explanation:

The substance that has a coefficient of 2 when you balance the equation for this redox reaction is nitrogen monoxide (d). To balance the equation, you need to make sure that the number of atoms of each element is the same on both sides of the equation. The balanced equation for the reaction is:

2Cu(s) + 4HNO3(aq) ➡️ 2Cu(NO3)2(aq) + 2NO(g) + 2H2O(l)

In this balanced equation, we can see that the coefficient in front of nitrogen monoxide (NO) is 2, indicating that the reaction produces 2 moles of nitrogen monoxide.