1) A
\(V_{C_2H_5OH}=\dfrac{400.30}{100}=120\left(ml\right)\)
2) B
Xảy ra 2 phản ứng:
\(2C_2H_5OH+2Na\rightarrow2C_2H_5ONa+H_2\)
\(2Na+2H_2O\rightarrow2NaOH+H_2\)
1.Độ rượu:
\(S=400\cdot\dfrac{30}{100}=120ml\)
Chọn A.
2.\(C_2H_5OH+Na\rightarrow C_2H_5ONa+\dfrac{1}{2}H_2\)
\(\Rightarrow\)Chọn A.