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  • 求大神寫(xiě)一篇制取氧氣的英語(yǔ)作文

    求大神寫(xiě)一篇制取氧氣的英語(yǔ)作文
    英語(yǔ)人氣:401 ℃時(shí)間:2019-08-22 19:51:22
    優(yōu)質(zhì)解答
    One of the main group of oxygen,air,heavier than air,standard condition (0 DEG C and pressure of 101325 kPa) under the density of 1.429 g / l..A colorless,odorless,tasteless.The solubility in water is very small.The pressure is 101kPa,the oxygen to pale blue liquid at about -183 degrees Celsius,at about -218 degrees Celsius into snowflake light blue solid.Molecular oxygen is paramagnetic.
    There are generally 3 kinds of methods for preparing oxygen.
    Method:Potassium Permanganate heating decomposition or potassium chlorate,manganese dioxide heat
    Method two:the decomposition of hydrogen peroxide
    Method three:liquid air separation method
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