Question

question 20 of 25 finish balancing the following equation: _al(s) + 3zn(no3)2(aq) → _al(no3)3(aq) +_zn(s) what coefficient does al(no3)3 have in the balanced equation? a. 3 b. 2 c. 1 d. 4

Explanation:

Step1: Balance nitrate ions

On the left - hand side, we have 6 nitrate ions from \(3Zn(NO_3)_2\). On the right - hand side, each \(Al(NO_3)_3\) has 3 nitrate ions. So, to balance the nitrate ions, the coefficient of \(Al(NO_3)_3\) should be 2.

Step2: Balance aluminum and zinc

With a coefficient of 2 for \(Al(NO_3)_3\), we need 2 moles of \(Al\) on the left - hand side. Also, with 3 moles of \(Zn(NO_3)_2\), we get 3 moles of \(Zn\) on the right - hand side. The balanced equation is \(2Al(s)+3Zn(NO_3)_2(aq)\to2Al(NO_3)_3(aq) + 3Zn(s)\).

Answer:

B. 2