Question

1. choose the best answer.

which formula shows the combined gas law?
$\frac{v_1}{t_1} = \frac{v_2}{t_2}$
$p_1v_1 = p_2v_2$
$\frac{p_1v_1}{t_1} = \frac{p_2v_2}{t_2}$

Explanation:

The combined gas law merges Boyle's Law, Charles's Law, and Gay-Lussac's Law, relating pressure (P), volume (V), and absolute temperature (T) of a fixed amount of gas. The first option is Charles's Law (constant pressure), the second is Boyle's Law (constant temperature), while the third combines all three variables.

Answer:

$\boldsymbol{\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}}$