The answer is B.
Tetraphosphorus is written as P4, and decaiodide as I10, so when you put them together, it's P4I10
<span>A.) the Appalachian Mountains</span>
Substances have more kinetic energy in the gas state than in the solid state
Answer:
efflorescence is the migration of a salt to the surface of a porous material, where it forms a coating.
The third answer is the one you want. You have to have an adjustable density. All other things being equal, if the tanks you use for holding just water when filled with water will let the sub sink, because the sub is made of a dense metal like iron or steel.
If on the other hand you fill these tanks with air, the net density will be below one and the sub will rise.