Which of the following would most practically be studied by use of a model? the global movement of ocean water. the veins of a leaf. the parts that make up a can opener. the inside of a light bulb.

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

State one important difference between a physical change and a chemical change?

The solubility of barium nitrate is 9.02 g/100 g h2o at 20°c. a 15.2 g sample of barium nitrate is added to 200.0 g of water at 20°c. is the solution saturated, unsaturated, or supersaturated? a. unsaturated b. saturated c. supersaturated