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CHEMISTRY DEPARTMENT WAID ACADEMY AVOGADRO AND THE MOLE.

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Presentation on theme: "CHEMISTRY DEPARTMENT WAID ACADEMY AVOGADRO AND THE MOLE."— Presentation transcript:

1 CHEMISTRY DEPARTMENT WAID ACADEMY AVOGADRO AND THE MOLE

2 The mass of one mole of sodium is 23 g. What is the mass of one sodium atom? g g x g x g :30

3 What volume of oxygen, in litres, is required for the complete combustion of 1 litre of butane (C 4 H 10 )? 1.1 litres 2.4 litres litres 4.14 litres :30

4 Which of the following has the same volume as 32 g of sulphur dioxide (SO 2 ) gas? (All volumes are measured under the same conditions of temperature and pressure). 1.2 g of helium gas. 2.2 g of hydrogen gas g of neon gas g of oxygen gas. :30

5 The density of chlorine gas is found to be 3.00 g l -1. Under the experimental conditions, the molar volume, in litres is :30

6 Avogadro's constant is the same as the number of 1.molecules in 1 mole of oxygen gas. 2.atoms in 1 mole of hydrogen gas. 3.ions in 1 mole of NaCl. 4.electrons in 1 mole of helium gas. :30

7 160 g of calcium contains as many atoms as 1.24 g of carbon g of sodium g of silver g of sulphur. :30

8 From the equation below 2KNO 3 (s)  2KNO 2 (s) + O 2 (s) Calculate the volume of oxygen formed when 0.05 mole of potassium nitrate decomposes. Take the molar volume of a gas to be 24 l mol litres litres litres litres :30

9 The number of ions in 1 mol of copper(II) phosphate, Cu 3 (PO 4 ) 2, is :30

10 What volume of gas, in cm 3, would be obtained by the reaction between 100cm 3 of ammonia gas and excess copper(II) oxide? 2NH 3 + 3CuO  3Cu + N 2 + 2H 2 O :30

11 A mixture of magnesium bromide, MgBr 2, and magnesium sulphate, MgSO 4, is known to contain 3 mol of magnesium and 4 mol of bromide ions. How many moles of sulphate ions are present? :30


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