How many molecules of each gas are present
A sample of air contains 72.75%nitrogen, 26.45% oxygen, 0.05% carbon dioxide, and 0.75% argon, byvolume. How many molecules of each gas are present in 1.00 L of thesample at 25°C and 1.00 atm?
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Will the reported molar concentration of the sodium hydroxide solution be too high, too low, or unaffected because of the moistness of the potassium hydrogen phthalate?
A bar of 24-karat (pure) gold is supposed to be completely solid. To check this, a scientist takes the bar into the lab. Using a scale, she finds that it has a weight of 9.8 N and an apparent weight of only 9.1 N when completely immersed in water.
Determine ( a) the time required for the train to travel the first 2.5 mi, ( b) the speed of the train as it arrives at the station, ( c) the final constant deceleration of the train.
A 63.0-O resistor is connected in parallel with a 120.0-O resistor. This parallel group is connected in series with a 19.0-O resistor. The total combination is connected across a 15.0-V battery.
Calculate the maximum pressure that the walls must withstand. Also find the cycle efficiency. Assume temperature independant properties for air. For ideal gas, Pv/T = constant.
An astronaut floating in space is separated from his ship. his mass is 85.0kg and he is 10.0m for his ship. he throws a wrench mass is .800kg in opposite direction with a velocity of 20.0m/s. How long will it take him to reach the ship.
An ideal air-standard closed Brayton cycle operates between the pressures of 1 atm and P2. What is the value of the inlet pressure to the turbine?
Let Y be b(192,p). We rehect H0:p=0.75 and accept H1: p>0.75 if and only if Y>=152. Use the normal approx to determine.
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