Ciara’s bike has rusted, which means that the iron in the metal changed to rust.

what has occurred?

a: an energy formation
b: an exothermic reaction
c: a chemical reaction
d: a precipitate formation

C. a chemical reaction

Answer : The correct option is, (C) a chemical reaction

Explanation :

Rusting of iron : It is a chemical reaction because when an iron rusts, the molecules of iron react with the molecules of oxygen to form a iron oxide as a product.

Precipitate formation : It is formed when the anion and cation in the aqueous solution react together to form an insoluble ionic solids. This insoluble ionic solid is called as precipitate.

Exothermic reaction : During a chemical reaction, the heat or energy is released by the system into the surroundings is known as exothermic reaction.

Due to the chemical reaction, Ciara’s bike rusted which means that the iron in the metal changed to rust.

Hence, the correct answer is, (C) a chemical reaction

yeet youwelcome broo

0.3x0.21x0.08kg=mass 1 sheet

mass 500 = 500xmass 1

volume pile = 0.3x0.2x0.048

density=mass/volume= 500xmass 1/0.3x0.2x0.048

v patient student