Answer:
A. comparing the fossil to other fossils found in rock layers in the same area
Explanation:
Relative dating is defined as the process of finding age of fossil in which a fossils approximate age is determined by comparing it to similar rocks or fossils of the same age.
In relative dating, scientist do not determine the exact age of the fossil but determine the relative age on the basis of the relevant rocks or fossils.
Hence, the correct answer is "A. comparing the fossil to other fossils found in rock layers in the same area".
most likely Ca(s). calcium ( Ca) is a solid, whose particles are packed closely together
D. She is not right, because there will be more successful collisions
between reactants in the concentrated solutions.
First find the no. of moles of NaOH :
<span>30/1000 = 0.3 dm3 so no. of moles = 0.3*0.5 = 0.15 moles </span>
<span>as NaOH reacts with HNO3 in a ratio of one to one, there must have been 0.15 moles of HNO3 too </span>
<span>moles/volume = concentration </span>
<span>volume= 15/1000 = 0.15 dm3 </span>
<span>concentration = 1.15/0.15 = 1 mol.dm-3 </span>
<span>The quicker way would be to realize that you used twice as much NaOH so the HNO3 had to be twice as strong</span>
18 is 50% of 36
Like 36 divided by 2
