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

answer: a tank of height h is filled with water and sits on the ground. water squirts from a hole at a height y above the ground and has a range r. for two y values, 0 and h, r is zero. determine the value of y for which the range will be a maximum.

explanation: