Which of the following solutions have the same number of hydrogen ions as in 50 cm3 of 0.1 mol dm-3 sulphuric acid?

I 100 cm3 of 0.1 mol dm-3 hydrochloric acid
II 50 cm3 of 0.2 mol dm-3 nitric acid
III 100 cm3 of 0.2 mol dm-3 sulphuric acid
IV 50 cm3 of 0.1 mol dm-3 phosphoric acid

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)

idk what the question is about