A gas is compressed from a volume of 4.0 m³ to 2.0 m³, resulting in a pressure increase from 80,000 Pa. What is the new pressure of the gas (Pressure in gases (physics only))

The correct answer is 160000 Pa.

Unit lens: Check the units before giving the final statement so the physics quantity is not swapped. This question asks: A gas is compressed from a volume of 4.0 m³ to 2.0 m³, resulting in a pressure increase from 80,000 Pa. What is the new pressure of the gas (Pressure in gases (physics only)). The correct response is 160000 Pa, because density links mass and volume, so the answer must preserve which quantity is being calculated. In Pressure in gases (physics only), the marking point should connect directly to (Physics only) Calculate pressure when volume changes at constant temperature. If the question includes values, the working must keep the appropriate unit and operation; if it is an explanation, it must name the relevant particle behaviour or energy change. This item belongs to Particle model and pressure, so avoid answers that switch to a different quantity, confuse heat with temperature, or describe gas pressure without collisions when collisions are the reason. Checkpoint 553 is distinct because it uses this exact question context and the unit lens rather than a generic particle-model sentence.