Question

can plz solve this for me plz fast I need u

Answer 1

Answer:

a)valency of Al = 3 (z=13)

b)90./. and 10./.

Explanation:

b) let the percentage of 1st will be X then percentage of 2nd will be 100-X

so by using formula

mav=p1Z1+p2z2÷ P1+P2. (P1+P2 always be 100)

16.2=X(8)+100-x(8)÷100=90./.

so x will be 90./.

and the 100-x=10./.