Since there are only two isotopes, then that means the other isotope has an abundance of: 100 - 72 = 28%. Let y be the mass of the first isotope, and x be the mass of the second. The equation would be
85.5 = 0.72y + 0.28x
Now, rubidium has 37 protons, and each proton has a mass of 1.00727647 amu. When neutral, it must also have 37 electrons in which each electron weighs 0.000548597 amu. Let n be the number of neutrons, in which each neutron weighs <span>1.008664 amu. The solution is as follows:
y = 37(</span>1.00727647) + 37(0.000548597) + 48(1.008664) y = 85.7054 amu
Then, x would be: 85.5 = 0.72(85.7054) + 0.28x x = 84.972 amu So, x = 84.972 = 37(1.00727647) + 37(0.000548597) + n(1.008664) Solving for n, n = 47.27 ~ 47
<em>Therefore, there are 47 neutrons in the second isotope.</em>
A. Oxygen is produced during cellular respiration and stored during photosynthesis. B. Carbon dioxide and water released by cellular respiration are used in photosynthesis. C. Photosynthesis releases the energy that is stored during the process of cellular respiration