Question

Write the coefficients for the reactant and product.

Answer 1

Answer:

2, 7, 4, 6

2C₂H₆  + 7O₂ → 4CO₂ + 6H₂O

Explanation:

The given reaction is combustion of ethane. Ethane burns in the presence of oxygen and gives carbondioxide and water.

Chemical equation:

C₂H₆  + O₂ → CO₂ + H₂O

Balanced Chemical equation:

2C₂H₆  + 7O₂ → 4CO₂ + 6H₂O

C₂H₆  + O₂                          →                CO₂ + H₂O

In reactant side                                    in product side

C = 2                                                          C = 1

H = 6                                                          H = 2

O = 2                                                          O = 3

Multiply the reactant side C₂H₆ with 4 and O₂ 7.

2C₂H₆  + 7O₂                          →                CO₂ + H₂O

C = 4

H = 12

O = 14

Now multiply the CO₂ and  H₂O with a coefficient so that C =4, H = 12 and O = 14

2C₂H₆  + 7O₂                          →                4CO₂ + 6H₂O

C = 4                                                            C= 4

H = 12                                                         H= 12

O = 14                                                         O=14

Answer 2

Answer:

2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O

Explanation:

• The equation for the reaction shown represents the combustion of ethane.

C₂H₆ + O₂ → CO₂ + H₂O

• To balance the equation we put the coefficients, 2, 7, 4, and 6 on the reactants and products.

2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O

• Balancing chemical equations makes the number of atoms of each element equal on both side of the equation.

• It ensures that chemical equations obey the law of conservation of mass in chemical reactions.