Carbon burns in the presence of oxygen to give carbon dioxide. which chemical equation describes this reaction?
carbon + oxygen + carbon dioxide

Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back

A60-tooth gear is connected to a 72-tooth gear.if the smaller gear turns 12 times,how many turns does the larger gear make?