Answer:
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:
the second statement is the correct one quarks are needed to balance charges in all subatomic particles such as neutrons, protons and electrons
2.8 * 10 ^ 24 / 6.022 * 10 ^ 23 = 4.650 moles.
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