Answer:
Al₂O₃ + 6HNO₃ → 2Al(NO₃)₃ + 3H₂O
Step-by-step explanation:
left side of arrow right side of arrow
Al 2 1
O 3 1
H 1 2
NO₃ 1 3
Al₂O₃ + 6HNO₃ → 2Al(NO₃)₃ + 3H₂O
now there are,
left side of arrow right side of arrow
Al 2 2
O 3 3
H 6 6
NO₃ 6 6
you have to try and multiply different numbers and stop when you have equal molecule on both sides of the arrow.