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
notka56 [123]
2 years ago
15

There are two isotopes of an unknown element, X-19 and X-21. The abundance of X-19 is 14.55%. A weighted average uses the percen

tages of each isotope to scale their contribution to the total mass. Each isotope's contribution is the percentage (in decimal form) multiplied by the mass of the isotope. What is the contribution (in amu) to the weighted average from the X-19 isotope, which has a mass of 19.00 amu
Chemistry
1 answer:
alekssr [168]2 years ago
8 0

Answer:

2.765amu is the contribution of the X-19 isotope to the weighted average

Explanation:

The average molar mass is defined as the sum of the molar mass of each isotope times its abundance. For the unknown element X that has 2 isotopes the weighted average is defined as:

X = Mass X-19 * Abundance X-19 + MassX-21 * Abundance X-21

The contribution of the X-19 isotope is its mass (19.00 amu) times its abundance (14.55% = 0.1455). That is:

19.00amu * 0.1455 =

2.765amu is the contribution of the X-19 isotope to the weighted average

You might be interested in
What is 316 Kelvin in Celsius ?
ss7ja [257]

Answer:

42.85 Celsius

5 0
2 years ago
What is displacement reaction​
jenyasd209 [6]
A displacement reaction (also known as a replacement reaction) is when one element is replaced by another compound. Ex) Fe+CuSO4=FeSO+Cu
3 0
2 years ago
Read 2 more answers
During photosynthesis the chemical bonds between are broken
Vaselesa [24]

Answer:

yes they are broken down into smaller units

5 0
2 years ago
9.69 × 10^7 in decimal form
iren [92.7K]
The answer is 96,900,000

4 0
2 years ago
Please help ASAP pleas help right answer please
Otrada [13]
It is -2 because the charge will be at zero and electrons lower the charge
5 0
3 years ago
Other questions:
  • The proprietor of a rock shop insists that a nugget is pure gold. if the nugget occupies a volume of 5.40 ml, what would its mas
    12·1 answer
  • Hydrangea plant's petals change to which colour on the addition of acids?
    11·1 answer
  • What ion is formed when an atom of magnesium (mg) loses two electrons? mg–1 mg–2 mg 1 mg 2
    11·2 answers
  • Which geographic features are associated with a divergent boundary <br> (Can select more then one)
    7·2 answers
  • Help please Thank You so much!
    12·1 answer
  • How many isotopes does argon have?
    6·1 answer
  • Which of this is not an effect of humans using a natural recourse?
    11·1 answer
  • when magnesium is burned in air the mass of the product is greater than the mass of the solid magnesium burned. A student claims
    11·2 answers
  • What are radioactive isotopes?
    7·1 answer
  • Describe how the mass spectrometry readout is consistent with the chemical structure of hydrochloric acid.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!