Answer:
Option (3) is the correct answer.
Explanation:
Answer:
34.2 g
Explanation:
In the Hall-Heroult process, Al³⁺ (from Al₂O₃) is reduced to Al. The reduction half-reaction is:
Al³⁺ + 3 e⁻ ⇒ Al
We can establish the following relations:
- 1 A = 1 c/s
- 1 mole of e⁻ has a charge of 96468 c (Faraday's constant)
- 1 mol of Al is produced when 3 moles of e⁻ circulate
- The molar mass of Al is 26.98 g/mol.
Suppose a current of 6800 A is passed through a Hall-Heroult cell for 54.0 seconds. The mass of Al produced is:
Answer:
(d) Na₂CO₃ + CuSO₄ → Na₂SO₄ + CuCO₃
Explanation:
Chemical reaction:
Na₂CO₃ + CuSO₄ → Na₂SO₄ + CuCO₃
This is metathesis reaction. It is also called double displacement reaction. The cation and anions of both reactants exchange with each others.
The cation (Na⁺) of sodium carbonate is exchange with cation (Cu²⁺) of copper sulfate and form sodium sulfate and copper carbonate.
Double replacement:
It is the reaction in which two compound exchange their ions and form new compounds.
AB + CD → AC + BD
A major function of the endomembrane system is transporting substances in a cell.proteins are transported either in or out the cell