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I have a question below which is as followed

1) In the equation Na +

Cl2 → NaCl. Which is an unbalanced equation showing the formation of NaCl. What is the number of chlorine molecules are needed to form 252 molecules of NaCl?

2) The equation Fe2O3 (s) + 3SO3 (g) → Fe2(SO4)3. This equation explains the formation of iron(III) sulfate. How many molecules of Fe2(SO4)3 are formed if 144 molecules of SO3 gas is passed through a beaker containing iron(III) oxide? can we show steps and explain please its not quiet clear.

3)The chemical equation 2CuCl2 + SO2 + 2H2O → 2CuCl + 2HCl + H2SO4. How many moles of water is required to produce 144 moles of sulphuric acid?

I am studying and don't understand need guidance on this thanks

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