Question

balancing equations - problems
instructions: balance the chemical equations below.
1 _ ch₂o + _ h₂ → ___ ch₃oh
2 _ nh₃ → _ n₂ + ___ h₂
3 _ c₂h₆ → _ c₂h₄ + ___ h₂
4 _ n₂ + _ o₂ → ___ n₂o
5 _ co → _ c + ___ co₂
6 _ c₂h₂ + _ h₂ → ___ c₂h₆
7 _ cs₂ + _ o₂ → _ co₂ + _ so₂
8 _ ch₄ + _ h₂o → _ h₂ + _ co
9 _ so₂ + _ h₂ → _ h₂s + _ h₂o
10 _ ch₄ + _ s → _ cs₂ + _ h₂s
11 _ co₂ + _ h₂o → _ c₂h₆ + _ o₂
12 _ no₂ + _ h₂o → _ nh₃ + _ o₂

Explanation:

Step1: Balance equation 1 (C, H, O)

$1\text{CH}_2\text{O} + 1\text{H}_2
ightarrow 1\text{CH}_3\text{OH}$

Step2: Balance equation 2 (N, H)

$2\text{NH}_3
ightarrow 1\text{N}_2 + 3\text{H}_2$

Step3: Balance equation 3 (C, H)

$1\text{C}_2\text{H}_6
ightarrow 1\text{C}_2\text{H}_4 + 1\text{H}_2$

Step4: Balance equation 4 (N, O)

$2\text{N}_2 + 1\text{O}_2
ightarrow 2\text{N}_2\text{O}$

Step5: Balance equation 5 (C, O)

$2\text{CO}
ightarrow 1\text{C} + 1\text{CO}_2$

Step6: Balance equation 6 (C, H)

$1\text{C}_2\text{H}_2 + 2\text{H}_2
ightarrow 1\text{C}_2\text{H}_6$

Step7: Balance equation 7 (C, S, O)

$1\text{CS}_2 + 3\text{O}_2
ightarrow 1\text{CO}_2 + 2\text{SO}_2$

Step8: Balance equation 8 (C, H, O)

$1\text{CH}_4 + 1\text{H}_2\text{O}
ightarrow 3\text{H}_2 + 1\text{CO}$

Step9: Balance equation 9 (S, O, H)

$1\text{SO}_2 + 3\text{H}_2
ightarrow 1\text{H}_2\text{S} + 2\text{H}_2\text{O}$

Step10: Balance equation 10 (C, H, S)

$1\text{CH}_4 + 4\text{S}
ightarrow 1\text{CS}_2 + 2\text{H}_2\text{S}$

Step11: Balance equation 11 (C, H, O)

$2\text{CO}_2 + 6\text{H}_2\text{O}
ightarrow 2\text{C}_2\text{H}_6 + 7\text{O}_2$

Step12: Balance equation 12 (N, O, H)

$4\text{NO}_2 + 10\text{H}_2\text{O}
ightarrow 4\text{NH}_3 + 7\text{O}_2$

Answer:

1. $1\text{CH}_2\text{O} + 1\text{H}_2

ightarrow 1\text{CH}_3\text{OH}$

1. $2\text{NH}_3

ightarrow 1\text{N}_2 + 3\text{H}_2$

1. $1\text{C}_2\text{H}_6

ightarrow 1\text{C}_2\text{H}_4 + 1\text{H}_2$

1. $2\text{N}_2 + 1\text{O}_2

ightarrow 2\text{N}_2\text{O}$

1. $2\text{CO}

ightarrow 1\text{C} + 1\text{CO}_2$

1. $1\text{C}_2\text{H}_2 + 2\text{H}_2

ightarrow 1\text{C}_2\text{H}_6$

1. $1\text{CS}_2 + 3\text{O}_2

ightarrow 1\text{CO}_2 + 2\text{SO}_2$

1. $1\text{CH}_4 + 1\text{H}_2\text{O}

ightarrow 3\text{H}_2 + 1\text{CO}$

1. $1\text{SO}_2 + 3\text{H}_2

ightarrow 1\text{H}_2\text{S} + 2\text{H}_2\text{O}$

1. $1\text{CH}_4 + 4\text{S}

ightarrow 1\text{CS}_2 + 2\text{H}_2\text{S}$

1. $2\text{CO}_2 + 6\text{H}_2\text{O}

ightarrow 2\text{C}_2\text{H}_6 + 7\text{O}_2$

1. $4\text{NO}_2 + 10\text{H}_2\text{O}

ightarrow 4\text{NH}_3 + 7\text{O}_2$