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
nexus9112 [7]
3 years ago
13

An element has three stable isotopes with masses of 27.977 amu, 28.976 amu, and 29.973 amu. the heavier two isotopes have an abu

ndance of 4.68% and 3.09%, respectively. what is themass of the element?

Chemistry
1 answer:
Lera25 [3.4K]3 years ago
4 0
Check attached file for solution.

You might be interested in
What are limitations of a conclusion? I am doing a science lab write-up and under the conclusion it asks for limitations of the
enyata [817]
I believe it means the imitations on what you did what were you not able to do to the object. I'm not too sure but I believe that's what it means. I hope I was able to help
5 0
3 years ago
Which element is correctly classified
saul85 [17]

Answer:

Air is a qualified element

4 0
3 years ago
In the reaction:
Ghella [55]

Answer:

The answer is D because NH4+and OH- it will be

N-1. N-1,

H-5

O-1 H-5

O-1

5 0
3 years ago
An aqueous solution of iron(II) iodide has a concentration of 0.215 molal. The percent by mass of iron(II) iodide in the solutio
Basile [38]

Answer:

6.24%

Explanation:

Molality by definition means a measurement of the number of moles of solute in solution with 1000 gm or 1Kg solvent. Notice the difference that Molarity is defined on the volume of solution and Molality on the mass of solvent.

So, An aqueous solution of iron(II) iodide has a concentration of 0.215 molal.

means 0.215 moles are present in 1 Kg of solvent.

The molar mass of Fe2I = 309.65 g / mole

mass of FeI2 = moles x molar mass

= 0.215 x 309.65

=66.57 gm

mass % of FeI2 = mass of FeI2 x 100 / total mass

= 66.57x 100 / (1000 +66.57)

= 6.24%

                           

8 0
3 years ago
Answer the question briefly: How can atom collapse and why are atoms stable?
kykrilka [37]

The nuclei of atoms become unstable when the repelling forces of the protons cannot be balanced by the number of neutrons in the nucleus. It then re-arranges itself randomly to a more stable configuration by emitting any of a series of particles. During radioactive decay, an atom does not collapse.

Since an atom is mostly empty space - that is it’s nucleus is relatively distant from the electron shells so, in the presence of extreme forces such as gravity inthe collapse of a large star, the inward pressures on the atom overcome the natural balance of the atomic structure and the ‘empty space’ disappears as nuclei are mashed together by the intense pressures and a neutron star is formed. Under even more external pressure, even the neutron star can collapse to form a black hole.

8 0
3 years ago
Other questions:
  • Balance the following reaction.<br> C₂H6+ Cl2<br> C2H4Cl2 +<br> HCI
    11·1 answer
  • What is another name for the activation energy barrier in a reaction?
    9·2 answers
  • Element Y has two naturally occurring isotopes. The most dominant isotope has a mass of 114.3789 amu and a percent abundance of
    15·1 answer
  • Radio waves travel at the speed of light, which is 3X10^8 m/s. How many minutes does it take for a radio message to reach earth
    13·1 answer
  • Which ions contribute to alkalinity
    5·1 answer
  • Enter your answer in the provided box. To draw a Lewis structure, first add the number of outer (valence) electrons contributed
    10·1 answer
  • Bromine pentachloride formula
    11·1 answer
  • Someone help me please i’ll give brainly
    13·1 answer
  • Which of the following is not a property of water?
    5·1 answer
  • Choose the best answer.<br> What is the sum?<br> 2/3+7/15<br> O 14/15<br> O1/2<br> O1 2/15<br> O3/5
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!