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djyliett [7]
4 years ago
7

An unknown element X has two isotopes; 70% have a mass of 26 and 30% a mass of 30. What would be closest to the

Chemistry
1 answer:
Vinvika [58]4 years ago
8 0

Answer:

27.2 a.m.u

Explanation:

Isotope of an element is its tendency to exist in two or more forms. Thus, the average atomic mass of the element is required. And this can be calculated by adding the individual product of the percentage isotope and its mass.

The average atomic mass of the element can be determined by:

 = (70% x 26) + (30% x 30)

 = (0.7 x 26) + (0.3 x 30)

 = 18.2 + 9

 = 27.2

Thus, the average atomic mass of element X is 27.2 a.m.u

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Explanation:

Parkinson's disease is a progressive brain disease that affects movement. It affects the nerve cells that produce dopamine in the part of the brain called substantia nigra. The symptoms include shaking, stiffness, and difficulty with walking, balance, and coordination. Symptoms get worse with time, often leaving people with difficulty walking and talking.

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This is why the third option is the correct one.

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