![Dragon63770](/avatars/12772.jpg)
Dragon63770
12.07.2019 •
Chemistry
Rubidium is comprised of two isotopes, one of which has a natural abundance of 72% and contains 48 neutrons in the nucleus. given that the calculated atomic mass for rubidium is 85.5, how many neutrons are contained in the nucleus of an atom of the second isotope?
Solved
Show answers
More tips
- S Style and Beauty How to Make Your Lips Fuller? Ideas and Tips for Beautiful Lips...
- S Style and Beauty How are artificial nails removed?...
- F Family and Home How to Sew Curtain Tapes: Best Tips from Professionals...
- H Horoscopes, Magic, Divination How to Cast a Love Spell on a Guy? Guide for Guys...
- F Family and Home How to Properly Use a Water Level?...
- L Legal consultation What Documents Are Required for a Russian Passport?...
- H Health and Medicine How to Treat Styes: Causes, Symptoms, and Home Remedies...
- F Family and Home Protect Your Home or Apartment from Pesky Ants...
- T Travel and tourism Lost in the Catacombs: What to Do?...
- C Computers and Internet Make Easy Accessible Screenshots on iPad in Just a Few Minutes...
Answers on questions: Chemistry
- C Chemistry The four planets closest to the sun that are mostly made of rock and metal...
- C Chemistry Which activity is an example of a chemical change ?...
- C Chemistry The purpose of selective breeding is to...
- C Chemistry What do u notice about the molecules before and after the chemical reaction...
- C Chemistry CER Is using nuclear power really the answer to clean, environmentally friendly energy?...
- C Chemistry A 42.0 g sample of calcium carbonate decomposes in a flame to produce carbon dioxide gas and 23.5 g of calcium oxide. How much carbon dioxide (in grams) was released in the decomposition?...
- C Chemistry Which of the following graphs have the same wavelengths...
- C Chemistry PLEASE HELP ME :) Ice can melt to form water. The water can be frozen back to ice. Is ice melting a physical or chemical change? Explain....
- C Chemistry What observation led chadwick (and rutherford) to conclude there must be something besides just the proton in the nucleus of atoms?...
- C Chemistry Compare and contrast acids and bases in terms of their h+ ion and oh- ion concentrations....
Ответ:
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 1.008664 amu. The solution is as follows:
y = 37(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
Therefore, there are 47 neutrons in the second isotope.
Ответ:
Sure, ask me something, I can help.