Question

Which of these equations is balanced?

a. 3 H2SO4 + 2Al → Al2(SO4)3 + 3H2

b. 2KCl + Pb(NO3)2 → 2KNO3 + PbCl2





A. a

B. b

C. a and b

D. neither

Answer 1

Both are already balanced. So, your answer would be: C. a and b

Answer 2

To calculate your answer:
list atoms
multiply by subcript outside parentheses
multiply by coefficient

3 H2SO4 + 2Al → Al2(SO4)3 + 3H2

H 2 x3 =6 H 2 x 3 = 6
S 1 x 3 = 3 S 1x 3 = 3
O 4 x3 = 12 O 4 x 3 = 12
Al 1 x 2 = 2 Al 2


This one is balanced . . . now you try the other one. Let me know if you still need help