1. A solution is 40.0% acetic acid (characteristic component of vinegar) by mass. The density of this solution is 1.049 g/ml at 20 °C. Calculate the mass of pure acetic acid in 250 ml of this solution at 20
°C.

Noble gases are the most reactive elements on the periodic table. a. true b. false

Asample of the male sex hormone testosterone, c19h28o2, contains 3.88×10^21 atoms of hydrogen.(a) how many atoms of carbon does it contain? (b) how many molecules of testosterone does it contain? (c) how many moles of testosterone does it contain? (d) what is the mass of this sample in grams?

If you add 5.00 ml of 0.100 m sodium hydroxide to 50.0 ml of acetate buffer that is 0.100 m in both acetic acid and sodium acetate, what is the ph of the resulting solution? acetic acid: ka = 1.8. x 10-5