Which chemical equation is balanced? OA CO, + H,0 - H, CO,
O8 Mg0+ 2HCI - MgCly + H,0
O0 Ca0, + HCI CaCl, + H,0
O0K H,0- K,0 +H,

The chemical balanced : A and B

Given

Chemical equation

Required

Balanced equation

Solution

A chemical equation is said to be balanced if the number of atoms in the reactants and the number of atoms in the product are the same

a. CO₂+H₂O⇒H₂CO₃

balanced

b. MgO+ 2HCI ⇒ MgCl₂ + H₂O

balanced

c. CaO + HCI ⇒ CaCl₂ + H₂O

the elements H and Cl are not balanced

d. K + H₂O ⇒ K₂O +H₂

element K is not balanced

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.