If molar enthalpy of vaporization of ethanol is 38.6 kJ/mol, how many moles of ethanol are vaporized, when the required
heat is 200.72 kJ?

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.

A1 forms when an acid is neutralized by a base. 1. salts can be neutral, or in solutions. salts of 2. strong acid–strong base reactions produce solutions with 3. water. salts formed from the neutralization of weak acids or weak 4. bases water. they produce solutions that are acidic or . basic. for example, the ph of a solution at the equivalence point is . greater than for a acid titration. solutions that resist changes in ph are called solutions. the buffer is the amount of acid or base that can be added to a buffer without changing the ph greatly.

The ksp of srso4 is 3.2 × 10–7. what is the equilibrium concentration of sulfate ion in a 1.0-l solution of strontium sulfate to which 0.10 mol of sr(ch3co2)2 has been added? a. 3.2 × 10–8m b. 3.2 × 10–6m c. 5.7 × 10–4m d. 8.0 × 10–4m