Which of the following is the best definition of a scientific theory? A.
a broad, well-supported explanation of related observations or events
B.
a description of a natural phenomenon that is always observed to occur under specific conditions
C.
a highly tentative statement about the natural world that is likely to be significantly changed or discarded
D.
a plausible answer to a scientific question that is used to guide research

A. A broad, well-supported explanation of related observations or events

Explanation:

A scientific theory is a detailed reasoning of a well supported observation or experiment. Though, not just anyone can create a scientific theory... it has to be widely accepted throughout the scientific community!

A law on the other hand, is simply a description of things that happen in the natural world. It doesn't quite say why, with a law, it just is what it is! Laws don't become theories and theories do not become laws!

I hope I was of assistance! Science can be difficult! Have a nice day and spread the love <3

n2(g) + 3h2-> 2nh3(g)   this is the balanced equation

note the mole ratio between n2, h2 and nh3.   it is 1 : 3 : 2   this will be important.

moles n2 present = 28.0 g n2 x 1 mole n2/28 g = 1 mole n2 present

moles h2 present = 25.0 g h2 x 1 mole h2/2 g = 12.5 moles h2 present

based on mole ratio, n2 is limiting in this situation because there is more than enough h2 but not enough n2.

moles nh3 that can be produced = 1 mole n2 x 2 moles nh3/mole n2 = 2 moles nh3 can be produced

grams of nh3 that can be produced = 2 moles nh3 x 17 g/mole = 34 grams of nh3 can be produced

note:   the key to this problem is recognizing that n2 is limiting, and therefore limits how much nh3 can be produced.

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

hope this