Which of the following would wight the highest?

Osmolarity of which of the following would be the highest?

Which of the following would have the highest osmotic pressure (Assume that all salts are 90% dissociated) ?

Which of the following gases would have the highest rms speed at 0^(@)C ?

Which of the following gases would have the highest RMS speed at 0^@C :

Which of the following will react at the highest rate ?

Which one of the following gases would have the highest r.m.s. velocity at 25^(@)C ?