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
just olya [345]
3 years ago
8

An element has two naturally occurring isotopes, X-85 with a mass of 84.9118 amu and a natural abundance of 72.17%, and X-87 wit

h a mass of 86.9092 amu and a natural abundance of 27.83%. Calculate the atomic mass of this element.
Chemistry
1 answer:
QveST [7]3 years ago
5 0

Answer:

This element is Rubidium (Rb) and has an average atomic mass of 85.468 u

Explanation:

The average mass of an element is calculated by taking the average of the atomic masses of its stable isotopes.

The enitre atomic mass = 100 % or 1

⇒ this consists of X-85 with 72.17 % abundance  with atomic massof  84.9118 g/mol

72.17 % = 0.7217

⇒ this consists of X-87 with  27.83 % abundance with atomic mass of 86.9092 g/mol

27.83 % = 0.2783

To calculate the mass of this isotope we use the following:

0.7271 * 84.9118 + 0.2783 * 86.9092 =85.468 g/mol

This element is Rubidium(Rb) and has an average atomic mass of 85.468 u

You might be interested in
Which of the following best defines average speed?
mr_godi [17]

Answer:

It is the total distance traveled over the total time .

7 0
2 years ago
Read 2 more answers
Water can form a solution by mixing with:
MA_775_DIABLO [31]

Explanation:

Solid, liquids and gases

8 0
2 years ago
Read 2 more answers
- Unit 1 Worksheet 4
3241004551 [841]
I think it is C or F
4 0
2 years ago
The number of moles of hydrogen that are needed to produce .253 moles of water​
Brut [27]

Answer:

454

Explanation:

j

8 0
3 years ago
Hey conner i miss you soooooo much and does anyone have tik tok
kherson [118]

Answer:

I have tik tok

Explanation:

6 0
2 years ago
Read 2 more answers
Other questions:
  • Nitric acid (HNO3) is a strong acid, and it is titrated with a standard solution of sodium hydroxide (NaOH), a strong base. Whic
    13·2 answers
  • Why does a cell phone have more mass than a feather?
    10·1 answer
  • When the chemical reaction 2NO(g)+O2(g)→2NO2(g) is carried out under certain conditions, the rate of disappearance of NO(g) is 5
    12·2 answers
  • Name the reagent if any that you would add to a solution of cobalt iii chloride
    5·1 answer
  • If you use 19 mL of 0.100 M KMnO4, how many moles have you used? The answer has to be in four decimal places (do not forget the
    14·1 answer
  • A Lewis structure is a two-dimensional representation of a molecule that does not necessarily show what shape that molecule woul
    5·1 answer
  • Why is it harder to break an ionic bond than a covalent? Need answer asap!
    5·1 answer
  • What is a substrate
    9·1 answer
  • When water and alcohol are mixed, the final volume is less than the total of volume of alcohol plus water added due to .......​
    12·1 answer
  • HELPPP PLS ILL GIVE 100 POINTS PLUS BRAINLY
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!