Justin bleeber is conducting a calorimetry experiment in chemistry class. he fills an empty soda can with water and hangs it from an iron ring. the can hangs above a cracker that is resting on a stand. justin uses his striker to light a bunsen burner. he uses the flame from the bunsen burner to light a wooden splint. the wooden splint is used to ignite the cracker. as the cracker burns it heats up the water in the soda can. waves of gas are seen coming out of the top of the can.
how many chemical changes did justin observe?
a) 1
b) 2
c) 3
d) 4

its first and third is your answer i did the qustion the fourth isnt right

we need the questions , i may then you.

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).