Find the mass of a sample of water if its temperature dropped 24. 8°C when it lost 870 J of heat. Hint. Which formula are you going to use? See

interactive PPT. Don't forget the unit. Show your work.

How much heat is required to warm a 135g cup of water from 15 °C to

35°C? Hint: the water is in a cup so what state of matter and specific heat?

Show your work.

Percent ionization for a weak acid (ha) is determined by the following formula: percent ionization=[ha] ionized[ha] initial×100%for strong acids, ionization is nearly complete (100%) at most concentrations. however, for weak acids, the percent ionization changes significantly with concentration. the more diluted the acid is, the greater percent ionization.a certain weak acid, ha, has a ka value of 9.4×10? 7.part acalculate the percent ionization of ha in a 0.10 m solution.part bcalculate the percent ionization of ha in a 0.010 m solution