If the standard reduction potential of a half-cell is positive, the reduction reaction is spontaneous when paired with a hydrogen electrode
<u>Explanation:</u>
- The relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell.
- If the standard reduction potential of a half-cell is positive, the reduction reaction is spontaneous when paired with a hydrogen electrode.
- The reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.
- The reduction to happen the electrons gained by the material that is being decreased must be transported from the atoms of ions of a different material.
Answer:
The mole fraction of benzene if 0.43
Explanation:
Let's apply the colligative property of vapor pressure lowering.
P° - Ps = P° . Xm
Where P° is vapor pressure of pure solvent
Ps is vapor pressure of solution
Xm is mole fraction of solute
Determine the solute and the solvent:
Solute: Toluene
Solvent: Benzene (Vapor pressure of pure bencene at 20°C, is 74.7Torr)
74.7 Torr - 32 Torr = 74.7 Torr . Xm
42.7 Torr / 74.7 Torr = 0.57 → Xm
Sum of mole fraction = 1
Mole fraction of bencene + Mole fraction of toluene = 1
Mole fraction of bencene + 0.57 = 1 ⇒ 1 - 0.57 = 0.43
Ionic substances always contain a metal ion bonded
Short Answer: <span>Solutions of dilute, weak acids - the only kind that you might taste - are sour. Weak, dilute bases are bitter. Solutions of bases are slippery.
Hope I get brainliest!</span>
CO2: 12.0107 + 15.9994(2) = 44
NH3: 14.0067 + 1 (3) = 17
1.55 (17/44) = .599g