Question

Which of these is the best evidence that a chemical reactions occurs when coal burns?

A-Coal is made up of more than one element
B-a new substance is produced
C-Oxygen is present
D-The shape of coal changes

Answer 1

most likely A not sure

because coal let's off smoke that has carbon minoxidil and carbon gets into the oxygen o2

Answer 2

B me get points

Step-by-step explanation:

:(