To draw a Lewis structure for a covalent compound, begin by calculating A, the available electrons, and N, the needed electrons.
what is N for silicon tetrachloride, SiCl4

( I know that the available amount is 32 but I can't figure out the needed amount)

False, as a substance changes from a solid to a liquid and from a liquid to a gas the molecules get farther apart from each other

A1 a 2 a 3 ooh lol i think that's it

  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