Answer:
They have different amounts of neutrons.
They have different mass numbers.
Explanation:
Carbon-12 and carbon-13 are two isotopes of the element carbon. The difference between carbon-12 and carbon-13 is the number of neutrons in each atom. Atoms of both isotopes of carbon contain 6 protons. Atoms of carbon-12 have 6 neutrons, while atoms of carbon-13 contain 7 neutrons. And because the mass number is the sum of protons and neutrons in the nucleus then will be different too. Atoms of carbon-12 have the mass number equal to 12 a.m.u. while atoms of carbon-13 have the mass number equal to 13 a.m.u. .
a.m.u. - atomic mass units
As given in statement:
[H+] = 10^-12
<span>Formula for pH:
pH = -log [H+] </span>
<span>Putting the value of H+ ion in formula:
pH = -log ( 10^-12) </span>
<span>pH = 12.0 </span>
<span>
pH 0-6 (Acidic)
pH 7 (neutral)
pH 8-14 (basic)
A solution with pH 12.0 is basic.
So according to above explanation
</span><span>a. The solution is basic in nature, is the correct answer.</span>
Permafrost soil (gelisol) is b) fragile.
density of the liquid = 0.786 g/mL
Explanation:
The mass of the liquid is equal to the final mass of the container minus the mass of the empty container.
The mass of the liquid = 81.35 - 62 = 19.34 g
The volume of the liquid = 24.6 mL
density = mass / volume
density of the liquid = 19.34 g / 24.6 mL = 0.786 g/mL
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