Question

question 1
6 pts
the following reaction: mg + feo → mgo + fe, is an example of
combination.
decomposition.
single - replacement.
double - displacement.
question 2
6 pts
the following reaction: k + nabr → kbr + na, is an example of
combination.
decomposition.
single - replacement.
double - displacement.

Explanation:

In a single - replacement reaction, one element replaces another element in a compound. In the reaction $Mg + FeO
ightarrow MgO+Fe$, magnesium ($Mg$) replaces iron ($Fe$) in iron(II) oxide ($FeO$). In the reaction $K + NaBr
ightarrow KBr + Na$, potassium ($K$) replaces sodium ($Na$) in sodium bromide ($NaBr$). A combination reaction has two or more reactants combining to form one product. A decomposition reaction has one reactant breaking down into two or more products. A double - displacement reaction involves the exchange of ions between two compounds.

Answer:

Question 1: C. single - replacement
Question 2: C. single - replacement