八下化学方程式练习一、气体检验方法：氧气：__________________________________________________________二氧化碳：__________________________________________________________水蒸气：__________________________________________________________二、写出各方应的现象和化学方程式1、磷在氧气燃烧现象：____________________________________________________化学方程式：__________________________________________________________2、木炭在氧气里燃烧现象：________________________________________________化学方程式：__________________________________________________________3、硫在空气里燃烧现象：___________________________________________________在氧气里燃烧现象：____________________________________________________化学方程式：__________________________________________________________4、铁在空气燃烧现象：__________________________________________________________化学方程式：__________________________________________________________5、呼吸作用：
