The study of heat and heat changes is called:

A. thermal energy

B. thermography

C. heat chemistry

D. thermochemistry

What are the two homologous structures?

A compound consists of 3.47 grams of oxygen and 1.52 grams of nitrogen. What is the empirical formula of this compound? a. NO b. N2O2 c. N2O d. NO2

A non metal which is good conductor of electricity

If 2 objects have the same volume, but one has more mass than the other, are the densities the same or different? Explain

Where is most of the high-level waste stored in the United States

Given 10.8 grams of substance Y, if the substance absorbs 231 kilojoules of energy and the specific heat of the substance is 6.55 J/g·°C, what is the change in temperature?

Which sphere includes rocks and minerals? A. atmosphere B. biosphere C. geosphere D. hydrosphere

What defines a material as being a mixture?

What do igneous rocks form from? (20pts!)

A gas at STP has a volume of 1.0 liter. If the pressure is doubled and the temperature remains constant, the new volume of the gas will be ... ?