Question

A.

Zn (s) + HCl (aq)
→ ZnCl2 (aq)
+ H2(g)
b. 2H20 (1)→ H2(g) + O2(g)
c. ALC3 (s) + H20 (1) → CH4 (g) + Al(OH)3 (s)
d. CH4 (g) + 2O2(g) → CO2 (g) + 2H20 (3)
Which chemical equation supports the law of conservation of mass

Answer 1

CH₄ + 20₂ → CO₂ + 2H₂O

Step-by-step explanation:

The reaction equation that supports the law of conservation of mass is the one in which the number of atoms on both sides of the expression are found to be the same.

The law of conservation of mass states that "in a chemical reaction, matter is neither created nor destroyed".

The reaction expressions are given as:

Zn + HCl → ZnCl₂ + H₂

2H₂O → H₂ + O₂

AlCl₃ + H₂O → CH₄ + Al(OH)₃

CH₄ + 20₂ → CO₂ + 2H₂O

In the highlighted reaction above:

Number of atoms

Reactants Products

C 1 1

H 4 4

O 4 4