Cho m (g) al tan hoàn toàn trong dd HNO3 thu được 1,12 lít (dktc) hỗn hợp khí NO N2 N2O tỉ lệ 2:2:1 giá trị m

Not a  mixture of two common elements that can be separated by physical means.

Adialysis unit requires 78.5 l of water.the estimated digit is 5. 

  the volume of  0.220 m k2s    solution  required  to  completely  react with 175 ml  of 0.115m co(no3)2  calculate the moles  of co(no3)2 =  molarity x volume/1000175 x0.115/1000= 0.02  moleswrite  the reacting  equationk2s(aq)  +  co(no3)2  = 2 kno3(aq)  + cos(s)by  use  of mole ratio between k2s to co(no3)2 which  is  1: 1 the moles of k2s is therefore = 175  x0.115/1000= 0.02  molesvolume = moles/molarity=0.02/0.22=0.09  ml  of k2s