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
andre [41]
3 years ago
11

Antimony has 2 naturally occurring isotopes. The mass of antimony-121 is 120.904 amu and the mass of antimony-123 is 122.904 amu

. Using the average atomic mass from the periodic table, find the abundance of each isotope. (Remember that the sum of the two abundances must be 100. Show your work.)
Chemistry
1 answer:
Sav [38]3 years ago
6 0
Wow, now this one is a hard one, took me quite a while to figure it out but here it is:
120.904(x)+122.904(1-x)=121.76 \\ 
120.904x-122.904x+122.904=121.76 \\ 
-2x+122.904=121.76 \\ 
-2x=-1.144 \\ 
x=.572  \\ 
1-.572=.428
The abundances of the two isotopes is:
Antimony-121 = 57.2%
Antimony-123 = 42.8%
You might be interested in
In reading a line drawing, how do you know where atoms of these elements are in the structure if they are missing from the drawi
Tanya [424]

Answer:

The atoms of an element are represented in a chemical line drawing with its chemical formula.

Explanation:

chemical structural drawing helps to represent the pattern for which an element is formed. Chemical elements are made up of atoms that represent their single state.

The line drawing is made up of lines (representing the chemical bond between atoms) and the atoms or various atoms that make up the element.

7 0
3 years ago
What is the result of adding 2.5 × 10³ and 3.5 × 10²?
Elanso [62]

Answer:

A

Explanation:

It is correct please I hope it helps! :)

7 0
3 years ago
Read 2 more answers
How do you do part B?
galina1969 [7]
I cannot see the whole equation.Therefore I shall not answer

7 0
2 years ago
Classify the following processes as exothermic or endothermic: (d) a person running;
Sonja [21]

The process releases energy and consequently we classify it as exothermic. (d) a person running releases warmness as muscle mass paintings. therefore, the procedure is exothermic.

d) Exothermic, heat is released as a person runs and muscle groups perform work.

A chemical response or bodily exchange is exothermic if warmth is released by using the system into the environment. Because the surroundings are gaining heat from the system, the temperature of the surroundings increases. The sign of q for an exothermic procedure is -ve due to the fact the device is dropping heat.

Some other examples of exothermic reactions:

1)Snow Formation in Clouds.

2)Burning of a Candle.

3)Rusting of Iron.

4)Formation of Ion Pairs.

5)response of strong Acid and Water. etc...

Learn more about exothermic reactions here: brainly.com/question/14018816

#SPJ4

6 0
1 year ago
What substance is oxidized in the following reaction? 4HCl + MnO2 → Cl2 + 2H2O + MnCl2
Blizzard [7]

Answer:

Cl⁻ was oxidized.

Explanation:

  • 4HCl + MnO₂ → Cl₂ + 2H₂O + MnCl₂

Oxidation can be defined as the process in which the oxidation number of a substance increases.

On the left side of the equation, Cl has a charge of -1 (in HCl); while on the right side of the equation Cl has a charge of 0 in Cl₂.

Thus, Cl⁻ was oxidized.

8 0
3 years ago
Other questions:
  • 1. How is mass number, Atomic number, number of neutron, proton and electron related? 2.List down the applications of isotopes.
    12·1 answer
  • Why are silver, platinum, palladium and osmium called noble metals?
    6·1 answer
  • How many moles of oxygen are necessary to completely react with propane (C3H8) to produce 16.3 mol of water according to the fol
    13·2 answers
  • The properties of a compound ____________________ those of its elements.
    10·1 answer
  • Atmospheric pressure arises due to the force exerted by the air above the Earth. At higher altitudes, the mass of the air above
    15·1 answer
  • How do I seperate a mixture of iron filings, salt, sand, and wood chips?
    9·1 answer
  • Who can help me with this? I will give brainliest lmk!
    5·1 answer
  • Please help me I’ll mark you the brainiest! Please do NOT answer if you don’t know it.
    8·1 answer
  • Brainliest and a free hug :) thank you!!
    11·1 answer
  • imagine yourself to be a cloth or plastic product manufacturer and prepare a 'flyer/add' as "my fabric /product is the best pls
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!