The melting of ice cream is an example of which of the following?

Chemical Change

Chemical Property

Physical Change

Physical Proptery

What is the electron configuration of the oxide ion (O^2-) ?

Water is a colorless and odorless liquid. It can exist in solid, liquid, and gas states. It boils at 100 degrees C and melts at 0 degrees C. Which option best describes this information?

Which of the following is an example of a compound? a. h2o b. cl c. na d. o

How much energy must be transferred as heat to the 420 kg of water in a bathtub in order to raise the water temperature from 25 degrees celsius to 37 degrees celsius

Five darts strike near the center of the target. Who ever threw the darks is?

Which of the following will most likely happen if you apply unbalanced forces to an object? It will change position. It will become charged. It will change mass. It will change size.

Magnetism easily separates what mixture? A). Sand and glass B). Sand and iron C). Sand and clay D). Sand and aluminum

Match the science with the best description?

Can magnetism be used to identify a substance

Nitrogen dioxide dimerizes to give dinitrogen tetroxide: 2NO2 (g) → N2O4 (g). At 298 K, 12.55 g of an NO2/N2O4 mixture exerts a pressure of 0.963 atm in a volume of 6.92 L. What are the mole fractions of the two gases in the mixture?