Question

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Answer 1

Answer:

a) The balanced equation is CH4+2O2→CO2+2H2O

b) Hydrogen chloride may be formed by the direct combination of chlorine (Cl2) gas and hydrogen (H2) gas; the reaction is rapid at temperatures above 250 °C (482 °F). The reaction, represented by the equation H2 + Cl2 → 2HCl, is accompanied by evolution of heat and appears to be accelerated by moisture.

c) Aqueous carbon dioxide, CO2 (aq), reacts with water forming carbonic acid, H2CO3

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Answer 2

Answer:

1. The combustion of methane is represented by the equation: CH4 + 2O2 → CO2 + 2H2O.

2. The reaction, represented by the equation H2 + Cl2 → 2HCl

3.Carbon dioxide reacts with water to form carbonic acid (Equation 1). Carbonic acid then dissociates to give the hydrogen ion (H+) and the hydrogen carbonate ion (HCO3-) (Equation 2). The ability of H2CO3 to deliver H+ is what classifies this molecule as an acid, thus lowering the pH of a solution.