Answer:
brainliest please
Explanation:
Examples include neon (Ne), argon (Ar), and krypton (Kr). Oxygen, like all the other elements in group 16, has six valence electrons.
pH = 2.1
Let 
resembles the acid; as a weak acid (a small value of 
) 
would partially dissociate to produce protons 
and 
, its conjugate base. Let the final proton concentration (i.e., ![[H^{+}]](https://tex.z-dn.net/?f=%20%5BH%5E%7B%2B%7D%5D%20)
) be 
. (Apparently 
) Construct the following RICE table:
By definition, (all concentrations are under equilibrium condition)
![\left\begin{array}{ccc}K_{a}&=&[H^{+}] \cdot [A^{-}] / [HA]\\&=&x^{2} /(0.14 - x)\end{array}\right](https://tex.z-dn.net/?f=%20%20%5Cleft%5Cbegin%7Barray%7D%7Bccc%7DK_%7Ba%7D%26%3D%26%5BH%5E%7B%2B%7D%5D%20%5Ccdot%20%5BA%5E%7B-%7D%5D%20%2F%20%5BHA%5D%5C%5C%26%3D%26x%5E%7B2%7D%20%2F%280.14%20-%20x%29%5Cend%7Barray%7D%5Cright%20)
It is given that
Equating and simplifying the two expressions gives a quadratic equation; solve the equation for gives:
The pH of a solutions equals the opposite of the logarithm of its proton concentration to base 10; thus for this particular solution
![\text{pH} = -\text{ln(}[H^{+}]\text{)} / \text{ln(}10\text{)} = 2.1](https://tex.z-dn.net/?f=%20%5Ctext%7BpH%7D%20%3D%20-%5Ctext%7Bln%28%7D%5BH%5E%7B%2B%7D%5D%5Ctext%7B%29%7D%20%2F%20%5Ctext%7Bln%28%7D10%5Ctext%7B%29%7D%20%3D%202.1%20)
<span>The molar mass is 169.09
304.3g/169.09g = 1.799mol which rounds to 1.800 mol</span>
Answer:The strength of the gravitational force between two objects depends on two factors, mass and distance. the force of gravity the masses exert on each other.
Explanation: i hope it answers your question
