Photovoltaic cell is the correct answer ,it converts sunlight into electricity.Hope this helped!
Answer:
The number of moles of potassium hydroxide, KOH required to make 4 moles of K₂SO₄ is 8 moles of KOH
Explanation:
2KOH + H₂SO₄ → K₂SO₄ + 2H₂O
From the above reaction, we have 2 moles of KOH combining with 1 mole of H₂SO₄ to produce 1 mole of K₂SO₄ and 2 moles of H₂O.
Therefore the number of moles of potassium hydroxide that will be needed to make 4 moles of K₂SO₄ is;
8KOH + 4H₂SO₄ → 4K₂SO₄ + 8H₂O
8 moles of KOH is required to make 4 moles of K₂SO₄.
In the reduction-oxidation reaction given, Cu is reduced because it gained 2 electrons, on the other hand H2 is oxidized because it gained one electron. I hope this helps.
<span>The Geiger counter contains a metal tube containing a wire (electrode) and gas. When nuclear radiation (X-ray or Gamma) enters the tube it ionizes the gas (strips electrons from gas atoms) allowing the gas to conduct electricity when the metal tube and electrode are maintained at a voltage differential. A circuit counts the frequency of ionizations. Alpha particles (helium nuclei) can be stopped by a sheet of paper and Beta particles (electrons) are often not energetic enough to penetrate metal. See source
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I think b because it talks more about the question
