Answer:
c. ![Kc = \frac{[Ag(NH_{3})_2^{+}][Cl^-]}{[NH_3]^2}}](https://tex.z-dn.net/?f=Kc%20%3D%20%5Cfrac%7B%5BAg%28NH_%7B3%7D%29_2%5E%7B%2B%7D%5D%5BCl%5E-%5D%7D%7B%5BNH_3%5D%5E2%7D%7D)
d. ![Kc = [Ba^{2+}][F^{-}]^2](https://tex.z-dn.net/?f=Kc%20%3D%20%5BBa%5E%7B2%2B%7D%5D%5BF%5E%7B-%7D%5D%5E2)
Explanation:
An heterogeneous equilibrium is defined as a system whose reactants, products, or both are in more than one phase.
Also, you must know in an equilibrium constant you don't take solids or pure liquids. Thus:
a. ![Kc = \frac{[NH_{4}^+][OH^-]}{[NH_3]}}](https://tex.z-dn.net/?f=Kc%20%3D%20%5Cfrac%7B%5BNH_%7B4%7D%5E%2B%5D%5BOH%5E-%5D%7D%7B%5BNH_3%5D%7D%7D)
The reaction must be: NH₃(aq) + H₂O(l) ⇆ NH₄⁺(aq) + OH⁻(aq) <em>All reactants are in the same phase.</em>
b. ![Kc = \frac{[H^+][C_2H_3O_{2}^-]}{[HC_2H_3O_2]}}](https://tex.z-dn.net/?f=Kc%20%3D%20%5Cfrac%7B%5BH%5E%2B%5D%5BC_2H_3O_%7B2%7D%5E-%5D%7D%7B%5BHC_2H_3O_2%5D%7D%7D)
The reaction must be: HC₂H₃O₂(aq) ⇄ H⁺(aq) + C₂H₃O₂⁻(aq) <em>All reactants are in the same phase.</em>
c.
The reaction must be: 2NH₃(aq) + AgCl(s) ⇄ Ag(NH₃)₂⁺(aq) + Cl⁻(aq)
<em>Reactants aren´t in the same phase. Heterogeneous equilibrium</em>
d.
The reaction must be: BaF₂(s) ⇆ Ba²⁺(aq) + 2F⁻(aq)
<em>Reactants aren´t in the same phase. Heterogeneous equilibrium</em>
I hope it helps!
The force that holds protons and neutrons together is too strong to overcome.
<h3>Explanation</h3>
Consider the location of the particles in an atom.
- Electrons are found outside the nucleus.
- Protons and neutrons are found within the nucleus.
Protons carry positive charges and repel each other. The nucleus will break apart without the strong force that holds the protons and neutrons together. This force is much stronger than the attraction between the nucleus and the electrons. X-rays are energetic enough for removing electrons from an atom. However, you'll need a collider to remove protons from a stable nucleus. You could well have ionized the atom with all that energy.
Also, changing the number of protons per nucleus will convert the halogen atom to an atom of a different element. Rather than making the halogen negative, removing a proton will convert the halogen atom to the negative ion of a different element.
Answer:
pH is 2.58
Explanation:
The pH of the buffer made from the mixture of phosphoric acid (H₃PO₄) and its conjugate base form (H₂PO₄⁻) follows the Henderson-Hasselbalch equation:
pH = pka + log [H₂PO₄⁻] /[H₃PO₄]
If 75% of the buffer is in the conjugate base form (H₂PO₄⁻), 25% will be as H₃PO₄. Replacing to find pH:
pH = 2.1 + log [75%] /[25%]
pH = 2.58
<em>pH is 2.58</em>
<em></em>
Answer: The correct answer is "B" two bonding domains(or bonding pairs) or two non bonding domains(or lone pairs)
Explanation:
Molecular geometry/structure is a three dimensional shape of a molecule. It is basically an arrangement of atoms in a molecule.It is determined by the central atom, its surrounding atoms and electron pairs.According to VSEPR theory, there are 5 basic shapes of a molecule: linear, trigonal planar, tetrahedral, trigonal bipyramidal and octahedral.
A)Four bonding domains and zero non bonding domains: shape is tetrahedral and bond angle is 109.5°
B)Two bonding domains and two non bonding domains(lone pairs): shape is bent and bond angle is 104.5°
C)Three bonding domains and one non bonding domain: shape is trigonal pyramidal and bond angle is 107°
D)Two bonding domain and zero non bonding domain: shape is linear and bond angle is 107°
E)Two bonding domain and one non bonding domain: bent shape and bond angle is 120°
F)Three bonding domains and zero nonbonding domain: shape is trigonal planar and bond angle is 120°
Hence Two bonding domains and two non bonding domains have the smallest bond angle.
Answer:
A source of electricity, a wire coil, and an iron core
Explanation:
An electromagnet has three critical components:
1. A source of electricity
This is often a battery.
It generates the electric current that produces the magnetic field.
2. A wire coil
The wire carries the electric current.
Stacking the wire into loops makes a stronger magnetic field.
The more loops in the coil, the stronger the field.
3. An iron core
An iron core greatly increases the strength of the magnetic field within it and at its ends.
