Answer:
Final Concentration = 3.252M
Explanation:
Let's bring out the data mentioned in the question.
Time, t = 3s
Rate = 0.0840 M/s
Initial Concentration = 3M
Final Concentration = x
The formular relating these parameters is;
Rate = ΔConcentration / ΔTime
Upon solving for ΔConcentration, we have;
ΔConcentration = Rate * ΔTime
ΔConcentration = 0.0840 * 3
ΔConcentration = 0.252
But ΔConcentration = Final Concentration - Initial Concentration
Hence,
Final Concentration = ΔConcentration + Initial Concentration
Final Concentration = 0.252 + 3
Final Concentration = 3.252M