A razão pela qual a eficiência energética protege o meio ambiente.

Use examples from the article to explain one positive and one negative effect that chemistry has had on society

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Use the drop-down menus to label each of the following changes p for physical change and c for chemical change. the substance changes to a new substance. the original substance can be recovered. the color changes. gas is produced and given off. the substance changes size, shape, or volume.