Moles

By
1.27 - What is a mole
1.30 Calculating percentage yield 
1.32 - What are empirical and molecular formulae 
1.33 - Calculate empirical and molecular formulae from experimental data 
1.35 - Calculations involving gas volumes and molar volume of gas

Comments

Post a Comment

Popular posts from this blog

1.1, 1.2 - States of matter

By
Image
States of matter: Solid - Difficult to compress - Fixed shape - Fixed volume  - Particles are closely packed Liquid - Molds shape to container  - Fixed volume  - Cannot be compressed  - Particles far apart  Gas - Particles far apart - No fixed shape - No fixed volume  - Easy to compress 
Read more

1.35 understand how to carry out calculations involving gas volumes and the molar volume of gas

By Anonymous
At standard temperature and pressure, one mole of any gas will occupy 24000 cm3; also known as 24dm3. Calculating molar volume from mass Example: 976 cm 3 of oxygen was found to have a mass of 1.3 g Calculate the molar volume of oxygen, under these conditions. Volume = mass x no. of moles Mass of oxygen, O 2 , = 32.0 g. Volume of 1 g = 976 ÷ 1.3 Hence, 32 g = (976 ÷ 1.3) × 32 = 24024 cm 3 Answer: 24.0 is the volume of 32.0 g of O 2 .
Read more

2.20 Oxidization

By
Image
Oxidization  Metals and metal oxides  Example  Magnesium + copper oxide --> magnesium oxide + copper Magnesium has been  oxidized to magnesium oxide   Copper has been reduced to copper Copper oxide is the oxidizing agent - it oxidizes but gets reduced in the process Mg is the reducing agent - it reduces the CuO to Cu but gets oxidized in the process e.g. Ca + ZnO --> CaO + Zn
Read more