Answer:
79.986
Step-by-step explanation:
Let A represent isotope ⁷⁹Br
Let B represent isotope ⁸¹Br
From the question given above, the following data were obtained:
For Isotope A (⁷⁹Br):
Mass of A = 79
Abundance of A (A%) = 50.69%
For isotope B (⁸¹Br):
Mass of B = 81
Abundance of B (B%) = 49.31%
Relative atomic mass of Br =?
The relative atomic mass (RAM) of Br can be obtained as follow:
RAM = [(Mass of A × A%) /100] + [(Mass of B × B%) /100]
= [(79 × 50.69) /100] + [(81 × 49.31) /100]
= 40.0451 + 39.9411
= 79.986 amu
Thus, the relative atomic mass of Br is 79.986
B because it’s really the answer
Initial amount of money: $800
After paying the cab driver $20 ; money = $800 - $20 = $780
Giving his mother 1/3 of the remaining amount, leaving him with 2/3 of it.
money = ($780) x (2/3) = $520
Giving his aunt 1/4 of the remaining amount, leaving him with 3/4 of it.
money = ($520)(3/4) = $390
Giving his friend 1/6 of the remaining amount, leaving him with 5/6 of it.
money = ($390)(5/6) = $325
Therefore, the amount of money Bob gets to keep is equal to $325.
Answer:
5
Step-by-step explanation:
5xy is the only x/y term, thus leading me to believe that 5 is the answer.
Answer:
⇛-4x².
Step-by-step explanation:
Given expression;
-32x^4 ÷ 8x^2
- -32 = -2*2*2*2*2*x*x*x*x
- 8x^2 = 2*2*2*x*x
So, -32x^4 ÷ 8x^2
⇛-32x^4/8x^2
⇛(-2*2*2*2*2*x*x*x*x)/(2*2*2*x*x)
⇛-2*2*x*x
⇛-4x² Ans.
Read more:
How do you factor 8x^4 -32x^2=0
brainly.com/question/10434885?referrer
If you have any doubt, then you can ask me in the comments.
