"CH4" is the one gas among the choices given in the question that would have the fastest rate of effusion. The correct option among all the options that are given in the question is the second option or option "B". I hope that this is the answer that has actually come to your great help.
Answer from: Quest
Well to my expert knowledge and my exquisite calculations i think the the negative ion # 412 is the key to sucess
An unknown substance has been shown to have weak covalent bonds. which of the following is most likely a property of this substance? a. high ph b. high conductivity c. low melting point d. low flammability