What is the kinetic energy of a 72.0-kg sky diver falling at a terminal velocity of 79.0 m/s? show your work. round your answer to the thousands place and include the units with your answer? How would I write this in the GUESS method

Sodium sulfate dissolves as follows: na2so4(s) → 2na+(aq) + so42- (aq). how many moles of na2so4 are required to make 1.0 l of solution in which the na concentration is 0.10 m?

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Which statement best describes the liquid state of matter? a. it has definite shape but indefinite volume. b. it has definite shape and definite volume. c. it has indefinite shape and indefinite volume. d. it has indefinite shape but definite volume.