What mass of aluminum can be heated from 12.71 to 72.03 by 5,737.39 amount of energy?

Round your answer to the nearest hundredth.

Step by step how do I solve this problem:

x²+ 0.200x + 0.01 = 0.095 - 0.190x

x²+ 0.390x - 0.085 = 0

How do I solve this problem?

Calculate the pH at the equivalence point when 50 mL of .015 Macetic acid (pka=4.74) is titrated with .030 M NaOH.