Convection currents occur in oceans because of differences in the density of ocean water. One reason that ocean water has different densities is due to the uneven heating and cooling of ocean water. Water that is warmer is less dense, and water that is cooler is more dense. What other factor impacts the density of ocean water?
A.
Ocean water with a high salt concentration is more dense than ocean water with a low salt concentration.
B.
Ocean water that is frozen as a glacier is more dense than ocean water in liquid form.
C.
Ocean water that is closer to the equator is more dense than ocean water that is farther from the equator.
D.
Ocean water that is closer to land is more dense than ocean water that is farther from land.

Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: 2al(s)+3cl2(g)→2alcl3(s) what is the maximum mass of aluminum chloride that can be formed when reacting 32.0 g of aluminum with 37.0 g of chlorine? express your answer to three significant figures and include the appropriate units.

Explain how the integumentary system plays a crucial role in the ability to maintain homeoestasis

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.