百度试题 结果1 题目13 What is the amount, in mol, of 15g of carbonate ions, CO22? A 0.18 B 0.25 C 4.0 D 5.6Your answer B 相关知识点: 试题来源: 解析 B 反馈 收藏
解析 a)6x1023即是1mol,即1mol原子的氧元素.质量为16×1=16gb)1mol氧原子的氧气质量为 16×1=16gc)1mol的CO2 ,即44×1=44gd)2mol的Ag,108×2=216ge)0.2×108=21.6g 结果一 题目 让你求质量?来人,急What is the mass of(a)6x10^23 atoms of O(b)6x10^23 atoms of O2(c)one mole o...
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Given that the molecular mass of a compound is 360 g/mol, and that it has an empirical formula of CH2O, what is its' molecular formula? What is the empirical formula of benzene? The molecular formula mass of the compound CH2O is 120 amu. What are the subscripts in the actual molecular...
实验室用过氧化氢溶液分解的方法制氧气，该反应属于基本反应类型中的___反应，其中二氧化锰是___剂．若要证明二氧化锰催化剂，需要进行的三个实验是：①___；②___；③___．实验室用加热高锰酸钾的方法制氧气的过程中，管口放一团棉花的原因是：___，管口向下倾斜的原因是：___，实验结束后要先移导管...
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