Quantities of 50 ml of 1 m hcl and 50 ml of 1 m naoh are combined in a constant pressure calorimeter. both solutions are initially at 24.4 c. calculate the final temperature of the combined solutions. ah=-56.2 kj/mol. (ans: 31.1 c)

Evaluate this exponential expression,8. (2 + 3)2 – 42

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.