snc2p chemistry
extra practice
balance the equations below:
1) ___n₂ + ___h₂ → ___nh₃
2) ___kclo₃ → ___kcl + ___o₂
3) ___nacl + ___f₂ → ___naf + ___cl₂
4) ___h₂ + ___o₂ → ___h₂o
5) ___pb(oh)₂ + ___hcl → ___h₂o + ___pbcl₂
6) ___albr₃ + ___k₂so₄ → ___kbr + ___al₂(so₄)₃
7) ___ch₄ + ___o₂ → ___co₂ + ___h₂o
8) ___c₃h₈ + ___o₂ → ___co₂ + ___h₂o
9) ___c₈h₁₈ + ___o₂ → ___co₂ + ___h₂o
10) ___fecl₃ + ___naoh → ___fe(oh)₃ + ___nacl
11) ___p + ___o₂ → ___p₂o₅
12) ___na + ___h₂o → ___naoh + ___h₂
13) ___ag₂o → ___ag + ___o₂
14) ___s₈ + ___o₂ → ___so₃

Question

Accepted Answer

# Explanation:
## Step1: Balance the first equation
For $N_2 + H_2
ightarrow NH_3$, balance $N$ and $H$ atoms.
$$N_2 + 3H_2 = 2NH_3$$
## Step2: Balance the second equation
For $KClO_3
ightarrow KCl + O_2$, balance $O$ atoms.
$$2KClO_3 = 2KCl + 3O_2$$
## Step3: Balance the third equation
For $NaCl+F_2
ightarrow NaF + Cl_2$, balance $Cl$ and $F$ atoms.
$$2NaCl+F_2 = 2NaF + Cl_2$$
## Step4: Balance the fourth equation
For $H_2+O_2
ightarrow H_2O$, balance $O$ atoms.
$$2H_2+O_2 = 2H_2O$$
## Step5: Balance the fifth equation
For $Pb(OH)_2+HCl
ightarrow H_2O + PbCl_2$, balance $Cl$ and $H$ atoms.
$$Pb(OH)_2 + 2HCl = 2H_2O+PbCl_2$$
## Step6: Balance the sixth equation
For $AlBr_3+K_2SO_4
ightarrow KBr + Al_2(SO_4)_3$, balance $Al$, $Br$ and $SO_4$ groups.
$$2AlBr_3 + 3K_2SO_4 = 6KBr+Al_2(SO_4)_3$$
## Step7: Balance the seventh equation
For $CH_4+O_2
ightarrow CO_2 + H_2O$, balance $C$, $H$ and $O$ atoms.
$$CH_4 + 2O_2 = CO_2+2H_2O$$
## Step8: Balance the eighth equation
For $C_3H_8+O_2
ightarrow CO_2 + H_2O$, balance $C$, $H$ and $O$ atoms.
$$C_3H_8+5O_2 = 3CO_2 + 4H_2O$$
## Step9: Balance the ninth equation
For $C_8H_{18}+O_2
ightarrow CO_2 + H_2O$, balance $C$, $H$ and $O$ atoms.
$$2C_8H_{18}+25O_2 = 16CO_2+18H_2O$$
## Step10: Balance the tenth equation
For $FeCl_3+NaOH
ightarrow Fe(OH)_3 + NaCl$, balance $Fe$, $Cl$, $Na$ and $OH$ groups.
$$FeCl_3 + 3NaOH = Fe(OH)_3+3NaCl$$
## Step11: Balance the eleventh equation
For $P+O_2
ightarrow P_2O_5$, balance $P$ and $O$ atoms.
$$4P + 5O_2 = 2P_2O_5$$
## Step12: Balance the twelfth equation
For $Na+H_2O
ightarrow NaOH + H_2$, balance $Na$, $H$ and $O$ atoms.
$$2Na+2H_2O = 2NaOH + H_2$$
## Step13: Balance the thirteenth equation
For $Ag_2O
ightarrow Ag+O_2$, balance $Ag$ and $O$ atoms.
$$2Ag_2O = 4Ag+O_2$$
## Step14: Balance the fourteenth equation
For $S_8+O_2
ightarrow SO_3$, balance $S$ and $O$ atoms.
$$S_8+12O_2 = 8SO_3$$

# Answer:
1) $1$ $N_2 + 3$ $H_2 = 2$ $NH_3$
2) $2$ $KClO_3 = 2$ $KCl + 3$ $O_2$
3) $2$ $NaCl+1$ $F_2 = 2$ $NaF + 1$ $Cl_2$
4) $2$ $H_2+1$ $O_2 = 2$ $H_2O$
5) $1$ $Pb(OH)_2 + 2$ $HCl = 2$ $H_2O+1$ $PbCl_2$
6) $2$ $AlBr_3 + 3$ $K_2SO_4 = 6$ $KBr+1$ $Al_2(SO_4)_3$
7) $1$ $CH_4 + 2$ $O_2 = 1$ $CO_2+2$ $H_2O$
8) $1$ $C_3H_8+5$ $O_2 = 3$ $CO_2 + 4$ $H_2O$
9) $2$ $C_8H_{18}+25$ $O_2 = 16$ $CO_2+18$ $H_2O$
10) $1$ $FeCl_3 + 3$ $NaOH = 1$ $Fe(OH)_3+3$ $NaCl$
11) $4$ $P + 5$ $O_2 = 2$ $P_2O_5$
12) $2$ $Na+2$ $H_2O = 2$ $NaOH + 1$ $H_2$
13) $2$ $Ag_2O = 4$ $Ag+1$ $O_2$
14) $1$ $S_8+12$ $O_2 = 8$ $SO_3$

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QUESTION IMAGE

Question

Explanation:

Step1: Balance the first equation

Step2: Balance the second equation

Step3: Balance the third equation

Step4: Balance the fourth equation

Step5: Balance the fifth equation

Step6: Balance the sixth equation

Step7: Balance the seventh equation

Step8: Balance the eighth equation

Step9: Balance the ninth equation

Step10: Balance the tenth equation

Step11: Balance the eleventh equation

Step12: Balance the twelfth equation

Step13: Balance the thirteenth equation

Step14: Balance the fourteenth equation

Answer: