2. Acetylene gas, C2H2 , undergoes combustion to produce carbon dioxide and water
vapor. If 75.0 L of CO2
is collected over water at 20.0oC at an atmospheric
pressure of 997 mbar, how many grams of acetylene gas were combusted? (The
vapor pressure of water at 20.0oC is 2.3 kPa.

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

the answer is barium and copper bromide

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

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