What is a substance? * A. Water
b. Anything that is unique in it's properties
c. The things that make up all living and non-living things
d. Iron
e. All of the above
f. None of the above

Acamcorder has a power rating of 17 watts. if the output voltage from its battery is 7 volts, what current does it use?units:

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned