Question

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,

Answer 1

The chemical balanced : A and B

Further explanation

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