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
Aleksandr-060686 [28]
3 years ago
7

Rubidium has two naturally occurring isotopes: Rb-85 with mass 84.9118 amu and a natural abundance of 72.17 %, and Rb-87 with ma

ss 86.9092 amu and a natural abundance of 27.83 %. Calculate the atomic mass of rubidium.
Mathematics
1 answer:
lions [1.4K]3 years ago
8 0

Answer:

The atomic mass of rubidium is 85.468 u

Step-by-step explanation:

To determine the average atomic mass of an element, we take the weight average of the atomic masses of its naturally occurring isotopes. This means that alll isotopes together are calculated by multiplying the atomic mass  and the percentage of abundance . So we have sum of all the different isotopes ( which is 100 % of abundance)

For naturally occurring rubidium, there are 2 isotopes.

mass of Rb-85 x abundance + mass of Rb-87 x abundance

84.9118 x 0.7217 + 86.9092 x 0.2783 = 85,46767642

On the periodic table we can see for Rubidium 85.468 u which is the average atomic mass of Rubium ( and its 2 naturally occurring isotopes).

You might be interested in
Combine the like terms to create an equivalent expression. <br><br> 7x−x
Alina [70]

Hello from MrBillDoesMath!

Answer:

6x

Discussion:

7x = 7 times x

x   = 1  times x

So both terms are "like" terms in x:

7x - x = (7-1)x = 6x

Thank you,

MrB

3 0
3 years ago
Write a equation for y=|x| if the graph is translated right by 3 units and down by 1 unit
Leni [432]

Answer:

y=|x -3| -1

Step-by-step explanation:

4 0
3 years ago
Measuring Units Worksheet 2 Convert the following measurements. 1 a. 4.13 cm = mm 2 a. 486 cm = m 3 a. 4.2 m = cm 4 a. 706 cm =
DaniilM [7]

Answer:

  1. 41.3 mm
  2. 4.86 m
  3. 420 cm
  4. 7.06 m
  5. 2.2 cm
  6. 5.93 m
  7. 255 cm
  8. 79 cm
  9. 46.9 mm
  10. 3.29 m

Step-by-step explanation:

7 0
3 years ago
I WILL MARK BRAINLIST
ira [324]
I think the answer is E
5 0
3 years ago
Solve the following quadratic-linear system of equations.
Reika [66]
The answer should and must be Done

7 0
3 years ago
Other questions:
  • The price p of a pizza is $6.50 plus $0.75 for each of the t toppings on the pizza
    7·1 answer
  • Amelia knits 1/10 of a scarf in 48 minutes. What fraction of a scarf can Amelia knit in 1 hour? Show work
    12·1 answer
  • What is the surface area of the cube with the given edge length, s?
    5·2 answers
  • The weather service measures the temperature, T, every hour, h, beginning at midnight of each 24-hour period. On Friday, the tem
    12·1 answer
  • What is the value of √23
    9·1 answer
  • A movie<br> theater sells 2 boxes of candy for every 3 pickles. Hint 1st/2nd reduced *
    8·1 answer
  • Alexa ran 22.5 miles less than Anthony last week. She ran a total
    8·1 answer
  • The volume of a rectangular prism is 128 cubic centimeters.
    5·2 answers
  • Joe has 1.8 meters of rope. He has to cut pieces of rope that are 0.3 meters long. How many pieces can he cut
    8·1 answer
  • Camiece works at a hair salon and charged her client $80 for a silk press. If her client gave her a
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!