Answer:
+1 charge is the correct answer
hope it helps
The equator absorbs the most sunlight in earth
Answer:
The evidence showing that there is a chemical reaction taking place is the instantaneous temperature drop once the cold pack is shaken.
Explanation:
When an athlete applies a cold pack to the injury, they shake it before, mixing the water and <em>ammonium-nitrate fertilizer</em> inside the cold pack. This mixing is an endothermic reaction, which means it absorbs heat. In turn, the temperature falls to 35 F for around 10 minutes.
Explanation:
It is known that for a body centered cubic unit cell there are 2 atoms per unit cell.
This means that volume occupied by 2 atoms is equal to volume of the unit cell.
So, according to the volume density
![5 \times 10^{26} atoms = 1 [tex]m^{3}](https://tex.z-dn.net/?f=5%20%5Ctimes%2010%5E%7B26%7D%20atoms%20%3D%201%20%5Btex%5Dm%5E%7B3%7D)
2 atoms = ![\frac{1 m^{3}}{5 \times 10^{26} atoms} \times 2 atoms](https://tex.z-dn.net/?f=%5Cfrac%7B1%20m%5E%7B3%7D%7D%7B5%20%5Ctimes%2010%5E%7B26%7D%20atoms%7D%20%5Ctimes%202%20atoms)
= ![4 \times 10^{-27} m^{3}](https://tex.z-dn.net/?f=4%20%5Ctimes%2010%5E%7B-27%7D%20m%5E%7B3%7D)
Formula for volume of a cube is
. Therefore,
Volume of the cube = ![4 \times 10^{-27} m^{3}](https://tex.z-dn.net/?f=4%20%5Ctimes%2010%5E%7B-27%7D%20m%5E%7B3%7D)
As lattice constant (a) = ![(4 \times 10^{-27} m^{3})^{\frac{1}{3}}](https://tex.z-dn.net/?f=%284%20%5Ctimes%2010%5E%7B-27%7D%20m%5E%7B3%7D%29%5E%7B%5Cfrac%7B1%7D%7B3%7D%7D)
= ![1.59 \times 10^{-9} m](https://tex.z-dn.net/?f=1.59%20%5Ctimes%2010%5E%7B-9%7D%20m)
Therefore, the value of lattice constant is
.
And, for bcc unit cell the value of radius is as follows.
r = ![\frac{\sqrt{3}}{4}a](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B3%7D%7D%7B4%7Da)
Hence, effective radius of the atom is calculated as follows.
r = ![\frac{\sqrt{3}}{4}a](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B3%7D%7D%7B4%7Da)
= ![\frac{\sqrt{3}}{4} \times 1.59 \times 10^{-9} m](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B3%7D%7D%7B4%7D%20%5Ctimes%201.59%20%5Ctimes%2010%5E%7B-9%7D%20m)
= ![6.9 \times 10^{-10} m](https://tex.z-dn.net/?f=6.9%20%5Ctimes%2010%5E%7B-10%7D%20m)
Hence, the value of effective radius of the atom is
.