3. How many moles of sodium are needed to react with sulfuric acid to produce 3.75 moles of
sodium sulfate according to the following (unbalanced) reaction:
Na + _ H2(SO4) = __ Na2(SO4) + __ Hz

Explanation:

2Na + H₂SO₄ → Na₂SO₄ + H₂

From the equation of reaction, 2 moles of Na reacts with 1 moles of H₂SO₄ to produce 1 mole of Na₂SO₄.

1 mole of Na = 1 mole of Na₂SO₄

x moles of Na = 3.75 moles of Na₂SO₄

x = (3.75 * 1) / 1

x = 3.75 moles of Na.

3.75 moles of Na is required to produce 3.75 moles of Na₂SO₄

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

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