A student uses a variety of techniques to separate four different compounds from 2.10 g of a mixture. After separation of the mixture, the student weighs each compound and finds 0.443 g of naphthalene, 0.295 g NaCI, 0.344 g of sand, and 0.688 g
of iron.

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

Asample of air with a volume of 2.20m3 at a pressure of 105 kpa and a temperature of 30c is cooled to 10c and the pressure is reduced to 75.0 kpa. what is the new volume? 6.9 1.34 2.56 43.0 2.88

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt