Explanation:
Gasoline has many different types of hydrocarbons. This makes it a mixture.
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Equate the gravitational force to the electrostatic force:
<span>KC²/D² = Gm²/D² → C = m√[G/K] = 7.6√[6.67E-11/9E9] = 6.54E-10 coulombs </span>
<span>Number of electrons N = 6.24E18*C = 4.083E9 electrons</span>
Answer:
The correct answer is option c.
Explanation:
Formula used to determine an average atomic mass :
![\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i](https://tex.z-dn.net/?f=%5Ctext%7BAverage%20atomic%20mass%20%7D%3D%5Csum_%7Bi%3D1%7D%5En%5Ctext%7B%28Atomic%20mass%20of%20an%20isotopes%29%7D_i%5Ctimes%20%5Ctext%7B%28Fractional%20abundance%7D%29_i)
Mass of isotope Sb-121 = 120.904 amu
Fractional abundance of Sb-121 = 57.21% = 0.5721
Mass of isotope Sb-123 = 122.904 amu
Fractional abundance of Sb-123 = 42.79% = 0.4279
Average atomic mass of Sb:
![120.904 amu\times 0.5721+ 122.904 amu\times 0.4279=121.7598 amu \approx 121.76 amu](https://tex.z-dn.net/?f=120.904%20amu%5Ctimes%200.5721%2B%20122.904%20amu%5Ctimes%200.4279%3D121.7598%20amu%20%5Capprox%20121.76%20amu)