Mole concept to mass introduction 5Nov2020.pptx

Chemistry-Stoichiometry

1. Stoichiometry 1 DOZEN = 12 unit 1 MOLE = 6.022 X 10 23

2. 1 can pepsi black = 0.25 kg 12 can pepsi black = 3.0 kg (a) 1 dozen = ? kg 2 dozen = ? Kg ½ dozen = ? kg (b) 0.1 dozen = ? kg 0.3 dozen = ? Kg 0.25 dozen = ? Kg 0.04 dozen = ? kg Summary 1 Dozen pepsi black = ? can pepsi black = ? kg

3. C 2 H 5 OH C 2 H 5 OH + 3O 2 2CO 2 + 3H 2 O 1 Mole of C 2 H 5 OH = 6.022 x 10 23 = ? g (mass)

4. C 2 H 5 OH 1C 2 H 5 OH + 3O 2 2CO 2 + 3H 2 O Mole = mass/MM if we burn 10g of ethanol, how much of water and carbon dioxide will be produce? 10 g /46 = 0.22 moles Look at the ratio C02 = 0.44 moles, H20 = 0.66 moles Find the answer C02; 0.44 x 44 = 19.36g , H20 0.66 x 18 = 11.88g