Question

which formula represents charless law?
$\frac{p_1}{t_1}=\frac{p_2}{t_2}$
$\frac{v_1}{t_1}=\frac{v_2}{t_2}$
$\frac{p_1v_1}{t_1}=\frac{p_2v_2}{t_2}$
$p_1v_1 = p_2v_2$

Explanation:

Charles's law states that at constant pressure, the volume of a given mass of gas is directly proportional to its absolute temperature. The formula for Charles's law is $\frac{V_1}{T_1}=\frac{V_2}{T_2}$, where $V_1$ and $V_2$ are the initial and final volumes, and $T_1$ and $T_2$ are the initial and final absolute - temperatures respectively.

Answer:

$\frac{V_1}{T_1}=\frac{V_2}{T_2}$ (the second option in the list)