Question

1. magnesium metal combines with nitrogen gas

Explanation:

To determine the chemical reaction when magnesium metal combines with nitrogen gas, we follow these steps:

Step 1: Identify the reactants and products

• Reactants: Magnesium (Mg) and Nitrogen gas ($N_2$)
• Product: Magnesium nitride ($Mg_3N_2$)

Step 2: Write the unbalanced chemical equation

The reaction can be written as:

$$Mg + N_2 ightarrow Mg_3N_2$$

Step 3: Balance the chemical equation

• Balance Mg atoms: There are 3 Mg atoms in $Mg_3N_2$, so we put a coefficient of 3 in front of Mg on the left side.
• Balance N atoms: There are 2 N atoms in $N_2$ and 2 N atoms in $Mg_3N_2$ (since $Mg_3N_2$ has 2 N atoms), so the N atoms are already balanced.

The balanced chemical equation is:

$$3Mg + N_2 ightarrow Mg_3N_2$$

Step 4: Indicate the physical states (optional but common)

Magnesium is a solid (s), nitrogen gas is a gas (g), and magnesium nitride is a solid (s). So the complete equation is:

$$3Mg(s) + N_2(g) ightarrow Mg_3N_2(s)$$

Final Answer

The balanced chemical equation for the reaction between magnesium metal and nitrogen gas is $\boxed{3Mg(s) + N_2(g)
ightarrow Mg_3N_2(s)}$.

Answer:

To determine the chemical reaction when magnesium metal combines with nitrogen gas, we follow these steps:

Step 1: Identify the reactants and products

• Reactants: Magnesium (Mg) and Nitrogen gas ($N_2$)
• Product: Magnesium nitride ($Mg_3N_2$)

Step 2: Write the unbalanced chemical equation

The reaction can be written as:

$$Mg + N_2 ightarrow Mg_3N_2$$

Step 3: Balance the chemical equation

• Balance Mg atoms: There are 3 Mg atoms in $Mg_3N_2$, so we put a coefficient of 3 in front of Mg on the left side.
• Balance N atoms: There are 2 N atoms in $N_2$ and 2 N atoms in $Mg_3N_2$ (since $Mg_3N_2$ has 2 N atoms), so the N atoms are already balanced.

The balanced chemical equation is:

$$3Mg + N_2 ightarrow Mg_3N_2$$

Step 4: Indicate the physical states (optional but common)

Magnesium is a solid (s), nitrogen gas is a gas (g), and magnesium nitride is a solid (s). So the complete equation is:

$$3Mg(s) + N_2(g) ightarrow Mg_3N_2(s)$$

Final Answer

The balanced chemical equation for the reaction between magnesium metal and nitrogen gas is $\boxed{3Mg(s) + N_2(g)
ightarrow Mg_3N_2(s)}$.