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Softball5378
20.09.2019 •
Chemistry
What is the average atomic mass of all of the naturally occurring isotopes of nickel in amu?
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Ответ:
For Nickel, there are 5 naturally occurring isotopes. Their identities, masses and relative abundance are listed below
Isotope Abundance Atomic Mass
Ni-58 68.0769% 57.9353 amu
Ni-60 26.2231% 59.9308 amu
Ni-61 1.1399 % 60.9311 amu
Ni-62 3.6345% 61.9283 amu
Ni-64 0.9256% 63.9280 amu
To determine the average atomic mass of Nickel, the equation would be:
Average atomic mass = ∑Abundance×Atomic Mass
Using the equation, the answer would be:
Average atomic mass = 57.9353(68.0769%) + 59.9308(26.2231%) + 60.9311(1.1399%) + 61.9283(3.6345%) + 63.9280(0.9256%)
Average atomic mass = 58.6933 amu
Ответ:
[B] 8 moles.
Explanation:
Chemical equation: N2 + H2 = NH3
N2 + 3H2 = 2NH3 (balanced)