C is obvious because no other choice has any closer answer
More water is not always better. For example; cacti only need water about every two weeks, the same with succulent plants. Not every plant needs to be watered every day, or the plant may be overwatered and die.
Hey there!
Mg + HCl → MgCl₂ + H₂
Balance Cl.
1 on the left, 2 on the right. Add a coefficient of 2 in front of HCl.
Mg + 2HCl → MgCl₂ + H₂
Balance H.
2 on the left, 2 on the right. Already balanced.
Balance Mg.
1 on the left, 1 on the right. Already balanced.
Our final balanced equation: Mg + 2HCl → MgCl₂ + H₂
Hope this helps!
