In one process, 5.85 kg of CaF2 is treated with an excess of H2SO4 and yields 2.55 kg of HF. Calculate the percent yield of HF.

Use examples from the article to explain one positive and one negative effect that chemistry has had on society

What would be the original temperature of a gas that has a volume of 2.0 l and a pressure of 2.0 atm and an unknown temperature that the volume increased to 3.5 l in its pressure decreased to 1.0 atm if the final temperature is measured to be 11°c

Now look at the segment of the graph between the two data points marked with black squares. describe how the boiling point and melting point plots behave between these points. be as specific as possible.