Question

3. Calculate the number of moles in
i) 1 metric ton of Fe ii) 65 µg of Ca iii) 392 g of H2SO4 iv) 9 g of Al v) 6.022 * 1023 molecules of oxygen vi)44.8 L of CO2 at STP vii) 7.9 mg of Ca

Answer 1

Answer:

(i) 392 g of sulphuric acid <br> Molar mass of

<br> 98 g of sulphuric acid = 1 mol<br> 392 g of sulphuric acid = 1 mol

mol <br> (ii) 44.8 litres of sulphirc dioxide at N.T.P <br> 22.4 litres of sulphur dioxide at N.T.P = 1 mol <br> 44.8 litres of sulphur dioxide N.T.P <br> 22.4 litres of sulphur dioxide at N.T.P = 1 mol <br> 44.8 litres of sulphur dioxide at N.T.P =

mol <br> (iii)

moleculec of oxygen <br>

molecules of oxygen = 1 mol <br>

molecules of oxygen

mol <br> (iv) 8g of calcium <br> Gram atomic mass of Ca = 40 g <br> 40 g of calcium = 1 mol <br> 8.0 g of calcium = 1 mole

mol.

Step-by-step explanation:

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