Answer:
Abundance of Ga 70.925 is 0.399 and percentage abundance of Ga 39.9%
Abundance of Ga 68.926 is 0.601 and percentage abundance is 60.1 %.
Explanation:
we know there are two naturally occurring isotopes of gallium Ga 68.926 and Ga 70.925.
First of all we will set the fraction for both isotopes
X for the isotopes having mass 70.925
1-x for isotopes having mass 68.926
The average atomic mass of Ga is 69.72.
we will use the following equation,
70.925 x + 68.926 (1-x) = 69.72
70.925 x + 68.926 - 68.926x = 69.72
70.925x- 68.926x = 69.72 - 68.926
1.99 x = 0.794
x= 0.794/ 1.99
x= 0.399
abundance of Ga 70.925 is 0.399, because we solve the fraction x.
0.399 × 100 = 39.9 %
39.9 % is percentage abundance of Ga 70.925
now we will calculate the abundance of Ga 68.926.
(1-x)
1 - 0.399 = 0.601
abundance of Ga 68.926 is 0.601 and percentage abundance is
0.601 × 100= 60.1 %
Answer:
A man who makes maps
Explanation:
Cartographers specialize in the production of maps. They analyze and compile geographic data and mix it into a publishable map. Overall, cartography is a mixture of art, science, and technology. In this respect, cartographers find their job challenging and enjoyable
Answer:
The change in the Gibbs function of reaction on going from crust to core, dG=291442.4 J/mol
Explanation:
dG=vdp-sdT
Where T is the temperature .
P is the pressure.
S is entropy
V= 1cm3 =10-6 m3
P= 3*10∧6 atm = 3*10∧11 pa
The temperature at the center of the earth, Tc = 4*103 °C. : The temperature at the sufrace (crust) of the earth, Ts =298K.
Subistuting the values
dG = (10-6 *(3*1011-105) - (2.1(4373-298))
dG=291442.4 J/mol.
Answer:
I think Acetone will be captured and cooled.
Explanation:
Distillation is a method of separation based on the difference in boiling point of two liquids.
The liquid that has a lower boiling point is first separated from the mixture. It vaporizes, cooled and collected before the liquid that has a higher boiling point.
In this case, acetone is captured and cooled before water since it has a boiling point of 56ºC and water has a boiling point of 100ºC.
Answer:
6
Explanation:
Formula: Al2O3
If we require 2Al2O3
We divide 2 by 3
Sorry for the shadow of phone and fingers.
