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
Stella [2.4K]
2 years ago
12

Oxygen is composed of three isotopes: oxygen-16, oxygen-17 and oxygen-18 and has an average atomic mass of 15.9982 amu. Oxygen-1

7 has a mass of 16.988 amu and makes up 0.032% of oxygen. Oxygen-16 has a mass of 15.972 amu and oxygen-18 has a mass of 17.970 amu. What is the percent abundance of oxygen-18?
Chemistry
1 answer:
Irina-Kira [14]2 years ago
8 0

Answer:

The percent abundance of oxygen-18 is 1.9066%.

Explanation:

The average atomic mass of oxygen is given by:

m_{O} = m_{^{16}O}*\%_{16} + m_{^{17}O}*\%_{17} + m_{^{18}O}*\%_{18}

Where:

m: is the atomic mass

%: is the percent abundance

Since the sum of the percent abundance of oxygen isotopes must be equal to 1, we have:  

1 = \%_{16} + \%_{17} + \%_{18}

1 = x + 3.2 \cdot 10^{-4} + \%_{18}

\%_{18} = 1 - x - 3.2 \cdot 10^{-4}

Hence, the percent abundance of O-18 is:  

m_{O} = m_{^{16}O}*\%_{16} + m_{^{17}O}*\%_{17} + m_{^{18}O}*\%_{18}  

15.9982 = 15.972*x + 16.988*3.2 \cdot 10^{-4} + 17.970*(1 - 3.2 \cdot 10^{-4} - x)

x = 0.980614 \times 100 = 98.0614 \%                                                              

Hence, the percent abundance of oxygen-18 is:

\%_{18} = (1 - 3.2 \cdot 10^{-4} - 0.980614) \times 100 = 1.9066 \%                      

Therefore, the percent abundance of oxygen-18 is 1.9066%.

I hope it helps you!                                                      

You might be interested in
What is the rising of rock layers
algol [13]
The rising of rock layers is uplift
8 0
2 years ago
Read 2 more answers
Description of the process of coffee turning into water?
xeze [42]

Answer:

In this process, the coffee beans are soaked in caffeine-free green coffee extract, allowing the caffeine to be extracted from the bean and into the solution while the flavor components are retained in the beans. The Swiss Water Process results in coffee that is 99.9% caffeine-free.

Explanation:

Coffee: Coffee is a brewed drink prepared from roasted coffee beans, the seeds of berries from certain Coffee species. When coffee berries turn from green to bright red in color – indicating ripeness – they are picked, processed, and dried. Dried coffee seeds are roasted to varying degrees, depending on the desired flavor.

Water: Water is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms. It is vital for all known forms of life, even though it provides no calories or organic nutrients.

===================================================================

Hope this helped! If it did, please consider making this brainliest! :)

8 0
3 years ago
How many phosphorus atoms are there in 1.75 mol of calcium phosphate,<br> Ca3(PO4)2
elena-s [515]

Answer:

It has 2 phosphorus atoms in 1 mol

so for 1.75 mol =2×1.75

Explanation:

need thanks and make me brainiest if it helps you

6 0
3 years ago
How many moles of carbon dioxide are produced when 23.0 g of C3H2O3 is burned during the
Mars2501 [29]

Moles of Carbon dioxide : 0.75

<h3>Further explanation</h3>

Given

23 g C₃H₈O₃

Required

Moles of Carbon dioxide

Solution

Reaction

2C₃H₈O₃ + 7O₂ → 6CO₂ + 8H₂O

mol C₃H₈O₃ :

= mass : MW

= 23 g : 92,09382 g/mol

= 0.24975

From the equation, mol ratio of C₃H₈O₃ : 3CO₂ = 1 : 3, so mol CO₂ :

= 3/1 x mol C₃H₈O₃

= 3/1 x 0.24975

= 0.74925≈0.750 mol

5 0
3 years ago
Explain the law of conservation of energy
Brilliant_brown [7]
In physics, the law of conservation of energy states that the total energy of an iolated system remains constant, it is said to be conserved over time. energy can neither be destroyed rather it transforms from one form to another.

3 0
2 years ago
Other questions:
  • How is heating of sugar and heating of ammonium chloride different from each other? Explain your answer.
    11·1 answer
  • Is there such thing as a pure mixture?
    13·2 answers
  • Describe the relationship between the radius of a cation and that of the atom from which it is formed. a. cations are much small
    12·1 answer
  • 5. an atom that has lost or gained an electron and has become charged
    14·1 answer
  • 3Al + 3NH4ClO4 → Al2O3 + AlCl3 + 3NO + 6H2O<br> How many moles of AlCl3 are produced?
    9·3 answers
  • Explain how the effects of nuclear charge and the increasing number of core electrons in an atom oppose each other.
    10·1 answer
  • When solving an equation using Gay-Lussac's law, which of the following steps do not apply? A. List your knowns and unknowns. B.
    5·1 answer
  • The polymerization of amino acids produces:
    7·1 answer
  • 10. Which of the following group of colors of the visible light is listed from
    11·1 answer
  • 1. Use your knowledge of valence electrons and how they affect bonds to figure out how carbon (Group 14) and oxygen (Group 16) w
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!