EXERCISE 7.2 For each of the following reactions, write the molecular equation, the com-
plete ionic equation, and the net ionic equation.
a. Aqueous sodium sulfide is mixed with aqueous copper(II) nitrate to
produce solid copper(II) sulfide and aqueous sodium nitrate.
b. Aqueous ammonium chloride and aqueous lead(II) nitrate react to
form solid lead(II) chloride and aqueous ammonium nitrate.

Match the following items. 1. high-intensity bundle of energy being emitted from some decaying nuclei gamma ray 2. particle radiating from the nucleus of some atoms beta particle 3. negative particle identical to an electron but radiating from a decaying nucleus alpha particle

Explain why scientists use shared characteristics to make cladograms.

How do temperature and salinity affect deepwater currents? as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.