Ascientist finds a fossil that she thinks might make a good index fossil. which characteristics does this fossil most likely have? check all that apply

A good  index fossils  is one which is easily recognized , found in abundance , short - lived , distinctive quality and have wide geographic distribution.

Explanation:

Index  fossil :  these are remain of plant and animals that lived for a short period of time.

The following are qualities of good index fossil

1 . They should be found easily and should be in abundance.This helps in making the study of the scientist easy

2.They must have wide geological distribution.

3 . They should not get decomposed easily . This reduce their chances of converting into fossil.

4. Their life should be short .

5. They should exhibit definite characteristic such that they can be easily detected.

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.

it's filtration, but this is an assumption so my apologies if i got this