In order for a layer of rock to be considered a formation useable for relative dating, it must spread across a relatively large area that can be depicted on geologic map. Why is this important?

If you add 10ml of hot water to 10ml of cold water and the change in tempature 8°c calculate how much energy is gained by the cold water

Nuclear decay is the spontaneous decay of one element into a. an x-ray b. a ray of light c. another element

Scientists are often interested in knowing the molar heat of combustion – the heat released during the combustion of one mole of a substance. use the periodic table to find molar masses. how many moles of ethanol are present in the sample?