Question

acetaldehyde ($c_2h_4o$) is used as a food additive to give foods a green-apple flavor. it can be produced by combining ethene gas ($c_2h_4$) and oxygen gas ($o_2$). this chemical reaction is represented by the model below.determine the number of each type of atom in the reactants and products.| | number of atoms in reactants | number of atoms in products || ---- | ---- | ---- || h | 8 | 8 || c | | || o | | |

Explanation:

Step1: Count H atoms in reactants

Each $\text{C}_2\text{H}_4$ has 4 H; 2 molecules: $2 \times 4 = 8$

Step2: Count C atoms in reactants

Each $\text{C}_2\text{H}_4$ has 2 C; 2 molecules: $2 \times 2 = 4$

Step3: Count O atoms in reactants

$\text{O}_2$ has 2 O; 1 molecule: $1 \times 2 = 2$

Step4: Count H atoms in products

Each $\text{C}_2\text{H}_4\text{O}$ has 4 H; 2 molecules: $2 \times 4 = 8$

Step5: Count C atoms in products

Each $\text{C}_2\text{H}_4\text{O}$ has 2 C; 2 molecules: $2 \times 2 = 4$

Step6: Count O atoms in products

Each $\text{C}_2\text{H}_4\text{O}$ has 1 O; 2 molecules: $2 \times 1 = 2$

Answer:

Atom	Number of atoms in reactants	Number of atoms in products
C	4	4
O	2	2