Which of the following is the correct abbreviation for the air mass at point C in the diagram below
MT


mT


MP


mP

Which of the following is the correct abbreviation for the air mass at point C in the diagram below MT mT MP mP class=

Respuesta :

Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?