How many carbon atoms are in starch

What was the land like over 500 million years ago? what was under the sea?

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

Someone me with this: a mineral' is determined by its actomic structure.