【简答题】he best we can do is to make a reduction of 5%o in our previous quotation.We hope you will direct the attention of your customers to the superior quality of our products and reconsider the prices we q...
【简答题】湖泊是分层的,造成好氧和厌氧条件同时存在。铜是湖泊中的多种微量金属的其中一种,其离子有两个氧化态形式,分别是Cu(II)和Cu(I),当Cu(II)得到一个电子,能被还原为Cu(I),其标准还原电位是0.16 V 请计算,当p e = -4 和p e = 14 的时候,Cu(I)浓度和Cu(II)浓度的比例 请说明,第一问的两种条件,分别是氧化环境还是还原环境 请问,湖水表层,Cu是以何种氧化态存...