1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
finlep [7]
2 years ago
5

Magnesium (average atomic mass = 24.3050 amu) consists of three isotopes with masses 23.9850 amu, 24.9858 amu, and 25.9826 amu.

The abundance of the middle isotope is 10.00%. Estimate the abundances of the other isotopes.
Chemistry
1 answer:
iris [78.8K]2 years ago
5 0

Answer: The first isotope has a relative abundance of 79% and last isotope has a relative abundance of 11%

Explanation: Given that the average atomic mass(M) of magnesium

= 24.3050amu

Mass of first isotope (M1) = 23.9850amu

Mass of middle isotope (M2)=24.9858amu

Mass of last isotope(M3)= 25.9826amu

Total abundance = 1

Abundance of middle isotope = 0.10

Let abundance of first and last isotope be x and y respectively.

x+0.10+y =1

x = 0.90-y

M = M1 × % abundance of first isotope + M2 × % of middle isotope +M3 ×% of last isotope

24.03050= 23.985× x + 24.9858 ×0.10 + 25.9826×y

Substitute x= 0.90-y

Then

y = 0.11

Since y=0.11, then

x= 0.90-0.11

x=0.79

Therefore the relative abundance of the first isotope = 11% and the relative abundance of the last isotope = 79%

You might be interested in
4. How is the coordination number determined?
balandron [24]
A coordination number can be determined by the usage of an atom towards a molecule from seeing how many numbers of atoms would have to be combined together in an atom.
3 0
2 years ago
Help me please i put nine points!
Ahat [919]

Answer:

eons.

It would be D. An eon.

3 0
2 years ago
Help pls :) I am stuck on this chemistry question about percentage yields!
Charra [1.4K]
You just switch them around 
4 0
3 years ago
Lion 7
Sidana [21]

Answer:

A.

Explanation:

You should NEVER eat or drink anything in a lab area. You never know what chemicals or gases are in the lab, and they can harm you.

Wearing a drawstring hoodie won't protect you from chemicals.

Don't wait to clean up chemicals, immediately get a teacher and clean it up (follow the teachers instructions). You never know what has spilled, and if it is harmful or not, or if there is a certain procedure to clean it up.

Don't change the equipment in the middle of an experiment. This can tamper with your results, and depending on what you are working with, this can be dangerous.

3 0
2 years ago
Science question down below
aliya0001 [1]
Option 1/A (It is the first one)
6 0
3 years ago
Other questions:
  • A base has a molarity of 1.5 M with respect to the hydroxyl ion (OH-) concentration. If 7.35 cm³ of this base is taken and dilut
    7·1 answer
  • Describe the preparation of 2.000 L of 0.0500 M AgNO3 (169.87 g/mol) from the primary-standard-grade solid.
    8·1 answer
  • What mineral mostly form through chemical precipitation?
    8·1 answer
  • For which process is ΔS negative? Group of answer choices A. grinding a large crystal of KCl to powder B. raising the temperatur
    6·1 answer
  • Which particle changes to create an isotope of an atom? <br> A.proton<br> B.neutron<br> C.electron
    5·1 answer
  • What is Newtrons law
    10·2 answers
  • If an atom of sodium combines with (captures) an alpha particle that has 2 protons and 2 neutrons, its new mass number will be
    9·1 answer
  • Which of the following is an example of a phase change from liquid to gas?
    9·2 answers
  • Oxygen difluoride is a hazardous, highly explosive gas used as a propellant. A sample of this compound weighing 0.432 grams is a
    15·1 answer
  • Which statement best explains why an object appears green in sunlight?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!