According to Avogadro's Law, what is the effect of increasing the number of gas particles?

Avogadro's Law states that at constant temperature and pressure, the volume of a gas is directly proportional to the number of moles of gas present. This means that as the number of gas particles increases, the volume occupied by the gas will also increase, provided that the pressure and temperature remain constant.

If the volume is held constant, increasing the number of gas particles will increase the pressure. This occurs because more gas particles in the same volume results in more collisions between the particles and the walls of the container, which translates to an increase in pressure. Therefore, option C accurately reflects this relationship by highlighting that increasing the number of gas particles leads to increasing pressure when volume is held constant.

In contrast, other options do not accurately describe the relationship defined by Avogadro's Law. For instance, increasing the number of gas particles does not inherently lead to a decrease in pressure or an increase in temperature. Additionally, constant volume is not a definite outcome; rather, it is a condition under which the pressure is affected by the change in the number of gas particles.