Câu 1.
$\dfrac{v_1}{T_1}=\dfrac{v_2}{T_2}$
$<=>\dfrac{v_1}{27+273}=\dfrac{\frac{v_1}{2}}{T_2}$
$<=>\dfrac{1}{300}=\dfrac{\frac{1}{2}}{T_2}$
$=>T_2=150K$
Câu 2.
$\dfrac{p_1v_1}{T_1}=\dfrac{p_2v_2}{T_2}$
$<=>\dfrac{750v_1}{27+273}=\dfrac{p_2.1,5v_1}{195+273}$
$=>p_2=780mmHg$