What is the ph of a 0.5m solution of an acid with a pka of 8.4?

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

How are evaporation and sublimation similar? a both involve the formation of a gas. b both release energy to the surroundings. c both take place throughout a solid. d both take place at the surface of a liquid.