Question

in the chemical equation 2mg + o₂ → 2mgo, identify the reactant(s).
mg and mgo
o2
mg
mg and o2
you have a list that shows how reactive metals are: potassium (most reactive) > sodium > calcium > magnesium > aluminum > zinc > iron > copper (least reactive). will magnesium replace zinc in a compound?
no, because magnesium is lower on the list.
yes, because magnesium is higher on the list.
maybe, it depends on the other elements.
metals cannot replace other metals.
you mix silver nitrate (agno₃) and sodium chloride (nacl) in water. two new compounds, silver chloride (agcl) and sodium nitrate (nano₃), are formed. what

Explanation:

1. In a chemical equation, reactants are on the left - hand side. In $2Mg + O_2

ightarrow2MgO$, the reactants are magnesium ($Mg$) and oxygen ($O_2$).

1. In a reactivity series, a more reactive metal can displace a less reactive metal from its compound. Since magnesium is more reactive than zinc (higher on the reactivity list), it can replace zinc in a compound.

Answer:

1. D. Mg and O2
2. B. Yes, because magnesium is higher on the list.