2:7 ratio of ethane to O2 = 15:x 9solve for x)
x=52.5 mol O2
That would be the compound Ba(NO3)2. The Barium ion has a charge of 2+ so there are 2 NO3- ions in the formula to produce a neutral compound.
Electrons might be the answer
<span>coefficient is 2
2Al (s) + 3 ZnCl2s (aq) --> 3 Zn (s) + 2 AlCl3 (aq) </span>
