Answer:
The equilibrium constant Kc for the reaction is :
<u>16.07 </u>
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Explanation:
The balanced equation is :
First ,
"At the equilibrium, 60% of the hydrogen gas had reacted"
This means the degree of dissociation = 60% = 0.6
Here we are denoting degree of dissociation by ="x" = 0.6
Now , consider the equation again,
H2 I2 2HI
0.35 1.6 0 (Initial Concentration)
0.35(1 - x) 1.6(1 - x) 2x (At equilibrium)
0.35(1 - 0.6) 1.6(1 - 0.6) 2(0.6)
0.14 0.64 1.2
calculate the concentration of each:
The equilibrium constant for this reaction "Kc" can be written as:
![Kc=\frac{[HI]^{2}}{[H_{2}][I_{2}]}](https://tex.z-dn.net/?f=Kc%3D%5Cfrac%7B%5BHI%5D%5E%7B2%7D%7D%7B%5BH_%7B2%7D%5D%5BI_%7B2%7D%5D%7D)
Precision refers to the closeness of two or more measurements to each other. Using the example above, if you weigh a given substance five times, and get 3.2 kg each time, then your measurement is very precise. Therefore, your answer is (B)
Answer:
Answer is explained below:
Explanation:
Your feet rub electrons off the carpet so, when we walk on carpeted floor more electrons move into our body and this is because of static electricity. Static electricity is stationary electric charge, generally produced by friction.
When electrons are removed from the outermost shell of calcium atom, its atom becomes positively charged, with a charge of plus one.
When an electron is added to an atom, the atom becomes negatively charged, with a charge of minus one.
When these atoms become positively or negatively charged, they are known as ions. Positively charged ions are called cations and negatively charged ions are called anions.
Calcium is identified as one of the cations because it is positively charged when its electrons are removed from its outermost shell.
