Answer: O fluorine to complete the octet rule
that right
Answer:
-138.9 kJ/mol
Explanation:
Step 1: Convert 235.8°C to the Kelvin scale
We will use the following expression.
K = °C + 273.15 = 235.8°C + 273.15 = 509.0 K
Step 2: Calculate the standard enthalpy of reaction (ΔH°)
We will use the following expression.
ΔG° = ΔH° - T.ΔS°
ΔH° = ΔG° / T.ΔS°
ΔH° = (-936.92kJ/mol) / 509.0K × 0.51379 kJ/mol.K
ΔH° = -3.583 kJ (for 1 mole of balanced reaction)
Step 3: Convert -9.9°C to the Kelvin scale
K = °C + 273.15 = -9.9°C + 273.15 = 263.3 K
Step 4: Calculate ΔG° at 263.3 K
ΔG° = ΔH° - T.ΔS°
ΔG° = -3.583 kJ/mol - 263.3 K × 0.51379 kJ/mol.K
ΔG° = -138.9 kJ/mol
Answer:
Explanation:
electrolysis is the technique that use direct current to drive a non spontaneous chemical reaction chemical reaction is the gain or lose of electron this technique is use to extract metal from theirs ores
Balanced chemical reaction:
<span>8H</span>⁺<span>(aq) + 6Cl</span>⁻<span>(aq) + Sn(s) + 4NO</span>₃⁻<span>(aq) → SnCl</span>₆²⁻<span>(aq) + 4NO</span>₂<span>(g) + 4H</span>₂O<span>(l).
Nitrate anion (NO</span>₃⁻) is oxidazing agent, because nitrogen (oxidation number +5) in nitrate gains electrons and became nitrogen dioxide (NO₂), where now nitrogen has oxidation number +4, so nitrogen is reduced.