Indicate which statement describes a scientific theory. A. For every action, the is an equal and opposite reaction.

B. Any two objects, no matter their mass, exert gravitational force toward one another.

C. Within a sequence of layers of sedimentary rock, the oldest layer is at the bottom while the youngest layer is at the top.

D. Earth's average temperature will continue to increase because of the deterioration of the ozone layer.

Find the mass in grams of hydrogen gas produced when 14.0 moles of hcl is added to an excess amount of magnesium.

Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)

The continuous release of nuclear energy caused when one fission reaction triggered more nuclear reactions is a