Answer:
A- Group 1/1A
Explanation:
In group 1A they are all highly reactive metals, which tarnish when exposed to air.
Answer:
Explanation:
2Al₂O₃ ⟶ 4Al +3O₂
n/mol: 1.26
The molar ratio is 4 mol Al:2 mol Al₂O₃.
Just get a triple balance beam and put chemicals on it to measure the weight
Top left cornor the is a green botten hit it