Mg gained mass because it went from being a single element (on the reactant side) to being a molecule (on the product side).
Answer:
5
Explanation:
NH4OH
The subscript gives the info that there are 4 hydrogen atoms but there is another H in the formula so you add them up.
US uses the <span>Fahrenheit temperature scale.</span>
C, because a homogeneous mixture is evenly mixed.
All those others would be heterogeneous (not evenly mixed).
