A particular element exists in two stable isotopic forms. One isotope has a mass of 62.9296 amu (69.17% abundance). The other isotope has a mass of 64.9278 amu. Calculate the average mass of the element and determine its identity.

Which actions would increase the rate at salt dissolves in water? stir the water? crush the salt? use less water? heat the water? cool the salt

An alkaline battery produces electrical energy according to the following equation. zn(s) + 2 mno2(s) + h2o(l) zn(oh)2(s) + mn2o3(s) (a) determine the limiting reactant if 17.5 g zn and 31.0 g mno2 are used. (type your answer using the format ch4 for ch4.) (b) determine the mass of zn(oh)2 produced. _ g

Explain that newton first law,second law and third law of motion?