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harina [27]
3 years ago
13

I NEED HELP PLZZZZ!!! THANK YOUUUU If an individual proton has mass 1.007825 amu and an individual neutron has mass 1.008665 amu

, and the observed atomic mass of gadolinium-157 is 156.92396 amu, what's its mass defect? Question 19 options: A) 1.38269 amu B) 1.35833 amu C) –1.35833 amu D) –1.38269 amu
Chemistry
1 answer:
Drupady [299]3 years ago
6 0

Answer:

1.38269 amu

Explanation:

Gadolinium-157 has 64 protons and 93 neutrons. Recall that mass defect his the difference between the calculated mass and the actual mass of the atom. This difference in calculated mass and actual mass exists because some mass is converted to the binding energy of the nucleus.

Mass of 64 protons= 64 × 1.007825 = 64.5008 amu

Mass of 93 neutrons= 93 × 1.008665 = 93.805845 amu

Mass of neutrons and protons= 64.5008 + 93.805845 = 158.306645 amu

Mass defect= 158.306645 - 156.92396 = 1.38269 amu

Therefore, mass's defect of gadolinium-157 is 1.38269 amu

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The chart with the information to answer this question may be found in other Brainly's link, so I attach it now.

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To facilitate the accompaniment of the reasoning, I copy the data here:

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The <em>distance</em> is the scalar magnitude that indicates the total length of the path traveled.

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In order to calculate the distance, the displacement and the ratio r = distance/displacement, to check which object has a distance that is three times as great as its displacement, i.e. r = 3, we use this new chart:

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  X          3 units left, 3 units right        3 + 3 = 6       3 - 3 = 0            ∞

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