Question

the density of gas increases when its?
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Answer 1

Answer:

When we heat it , the density of gas increases.

Answer 2

Answer:

Density and pressure/temperature

As pressure increases, with temperature constant, density increases. Conversely when temperature increases, with pressure constant, density decreases. Air density will decrease by about 1% for a decrease of 10 hPa in pressure or 3 °C increase in temperature.

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