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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 .
2.20 Oxidization
By
Unknown
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
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