16 is C
17 is E
18 is B
19 is A
20 is D
hope this helps :)
Because the easier a metal donates an electron (Low Ionization Energy), the more readily a non-metal with high electromagnetically will accept it.
Thus they match well, - one readily donates, the other readily accepts. This is how ionic bonding occurs.
Hope this helps.
Answer:
See the picture... I hope that's the answer
2:7 ratio of ethane to O2 = 15:x 9solve for x)
x=52.5 mol O2