Question

chemical reactions
identify the reactants and products in the following table. also indicate whether the following reaction is balanced or unbalanced. to know if it is balanced, see if you have the same number of elements on the reactant and product side (for example, in the first problem, there are four hydrogens on both sides and two oxygens on both sides, so it is balanced. for the second one, there is one na on the reactant side and two on the product side, so it is unbalanced)
equations reactants products balanced or unbalanced equation
2h₂ + o₂ → 2h₂o
na + o₂ → na₂o
n₂ + h₂ → nh₃
p₄ + 5o₂ → p₄h₁₀
fe + ho₂ → feo₂ + h₂o
no₂ + ch₃ → co₂ + nh₃

Explanation:

Step1: Identify reactants and products for $2H_2 + O_2

ightarrow2H_2O$
Reactants are $2H_2$ and $O_2$, products are $2H_2O$. Counting atoms: 4 H and 2 O on both sides, so balanced.

Step2: Identify reactants and products for $Na + O_2

ightarrow Na_2O$
Reactants are $Na$ and $O_2$, products are $Na_2O$. 1 Na on reactant side, 2 Na on product side, unbalanced.

Step3: Identify reactants and products for $N_2 + H_2

ightarrow NH_3$
Reactants are $N_2$ and $H_2$, products are $NH_3$. 2 N on reactant side, 1 N on product side, unbalanced.

Step4: Identify reactants and products for $P_4+5O_2

ightarrow P_4H_{10}$
Reactants are $P_4$ and $5O_2$, products are $P_4H_{10}$. There is no H on reactant side and H on product side, unbalanced.

Step5: Identify reactants and products for $Fe + HO_2

ightarrow FeO_2 + H_2O$
Reactants are $Fe$ and $HO_2$, products are $FeO_2$ and $H_2O$. Unbalanced as atom counts don't match.

Step6: Identify reactants and products for $NO_2+CH_3

ightarrow CO_2 + NH_3$
Reactants are $NO_2$ and $CH_3$, products are $CO_2$ and $NH_3$. Unbalanced as atom - counts don't match.

Equations	Reactants	Products	Balanced or Unbalanced Equation

|$2H_2 + O_2
ightarrow2H_2O$|$2H_2$, $O_2$|$2H_2O$|Balanced|
|$Na + O_2
ightarrow Na_2O$|$Na$, $O_2$|$Na_2O$|Unbalanced|
|$N_2 + H_2
ightarrow NH_3$|$N_2$, $H_2$|$NH_3$|Unbalanced|
|$P_4+5O_2
ightarrow P_4H_{10}$|$P_4$, $5O_2$|$P_4H_{10}$|Unbalanced|
|$Fe + HO_2
ightarrow FeO_2 + H_2O$|$Fe$, $HO_2$|$FeO_2$, $H_2O$|Unbalanced|
|$NO_2+CH_3
ightarrow CO_2 + NH_3$|$NO_2$, $CH_3$|$CO_2$, $NH_3$|Unbalanced|

Answer:

Equations	Reactants	Products	Balanced or Unbalanced Equation

|$2H_2 + O_2
ightarrow2H_2O$|$2H_2$, $O_2$|$2H_2O$|Balanced|
|$Na + O_2
ightarrow Na_2O$|$Na$, $O_2$|$Na_2O$|Unbalanced|
|$N_2 + H_2
ightarrow NH_3$|$N_2$, $H_2$|$NH_3$|Unbalanced|
|$P_4+5O_2
ightarrow P_4H_{10}$|$P_4$, $5O_2$|$P_4H_{10}$|Unbalanced|
|$Fe + HO_2
ightarrow FeO_2 + H_2O$|$Fe$, $HO_2$|$FeO_2$, $H_2O$|Unbalanced|
|$NO_2+CH_3
ightarrow CO_2 + NH_3$|$NO_2$, $CH_3$|$CO_2$, $NH_3$|Unbalanced|