When potassium iodide dissolves in water, the beaker becomes warm. Which statement best describes this process? A) The ΔHsolvation is exothermic and the overall ΔHsolution is exothermic. B) The ΔHsolvation is exothermic but the overall ΔHsolution is endothermic. C) The ΔHsolvation is endothermic but the overall ΔHsolution is exothermic. D) The ΔHsolvation is endothermic and the overall ΔHsolution is endothermic.

The answer for this pronles mis "a"  The ΔHsolvation is exothermic and the overall ΔHsolution is exothermic.

94.9% yield

Explanation:

Percent yield = actual yield/theoretical yield x 100

So you will divide the actual yield (what they really produced) over the theoretical yield (what they expected to produce). This will give you a decimal answer, which you multiply by 100 to get a percent.

169g/178g = 0.949 x 100 = 94.9%