Select the correct answer. given the data in the table, what is the average atomic mass of chlorine? a. 34.969 amu b. 35.453 amu c. 35.9675 amu d. 36.966 amu
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Ответ:
Ответ:
B. 35.453 amu
Explanation:
The average atomic mass of chlorine as seen from the periodic table is 35.453 amu.
Ответ:
nNaOH = 0,2 mol
Trong hỗn hợp các chất đề bài cho chỉ có phenol tác dụng với NaOH
C6H5OH + NaOH → C6H5ONa + H2O
0,2 ← 0,2 (mol)
⟹ mphenol = 0,2.94 = 18,8 gam
⟹
%mC6H5OH=18,8/28,9 x100%= 65,05%
Explanation: