来自贺小鹏的问题
标出下列各组物质中相同元素的化合价:(1)H2S______、S______、SO2______、Na2SO3______、H2SO4______.(2)MnO2______、MnCl2______、Mn______、CaMnO4______、KMnO4______.
标出下列各组物质中相同元素的化合价:
(1)H2S______、S______、SO2______、Na2SO3______、H2SO4______.
(2)MnO2______、MnCl2______、Mn______、CaMnO4______、KMnO4______.
1回答
2020-04-03 23:24