I think the answer would be d but not 100% sure
Out of the three you gave ecosystem is what I would call the most broad. An ecosystem includes living AND non-living things in an area
Community is all the LIVING things in an area (plants are included and I think bacteria is too, but I'm not sure)
Population is pretty narrow it just looks at specific species in one area. Population of mosquitoes doesn't include butterflies, if only looks at mosquitoes
Hope this helped!
Answer:Moseley used atomic number of an element and not the atomic mass unlike Mendeleev
A) Al4C3 moles in 100g=100g/144gmol¹-
Molar mass of Al4C3=144gmol¹-
one mole of Al4C3 reacts with 12 moles of water
required H2O moles=100/144*12=8.33mol
Do other parts like this.Hope u can do it yourself now
For this problem, we use the formula for
radioactive decay which is expressed as follows:<span>
An = Aoe^-kt
where An is the amount left after time t, Ao is
the initial amount and k is a constant. </span>
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</span>
<span>We can use the equation above to find the percent of the original substance at a given time. However, the time given here is equal to the half life of C-14. So the percent left would be 50% or half the original.
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