Question

In: Physics

A 29.3 L sample of air at 31.5% contains 0.275g of water vapor. What is the...

A 29.3 L sample of air at 31.5% contains 0.275g of water vapor. What is the relative humidity of the air, if the vapor pressure of water at this temperature is 34.8 torr? Answer must contain proper significant figures

A pipe contains water that has a flow rate of 475 gal/min. If water is flowing with a velocity of 2.5m/s, what is the diameter of the pipe in meters? Answer must contain the proper significant figures

A swimming pool of width 9.0m and length 24.0m is filled with water to a depth of 3.0m. Calculate pressure on the bottom of the pool due to the water. Assume that the atmospheric pressure is 741 torr and the density of water is 1.0045g/cm3. Answer must contain the proper significant figures.

Krypton gas (Kr) and an unknown gas are mixed in a container with a small hole in the side. The Kr gas escapes from the container at a rate of 0.882ml/s. The unknown gas escapes from the container at a rate of 1.5256mL/s. What is the molar mass of the unknown gas? If the gas is a diatomic made of two identical atoms, what is the unknown gas? Answer must contain the proper significant figures.

Expert Solution

Hi,

Hope you are doing well.

We are not allowed to answer all parts.

SO PART #2:

We know that according to equation of continuity, rate of flow is given by,

Where is area of cross-section of pipe () and V is the speed of flow.

Given that,

Rate of flow of water through the pipe,

since and

Speed of water flow,

Area of cross section of pipe is given by,

Diameter of the pipe is given by,

Rounding to 3 significant figures,

(kindly repost the remaining question separately)

genius_generous answered 5 days ago

A rigid 10-L vessel initially contains a mixture of liquid water and vapor at 100C with...

A rigid 10-L vessel initially contains a mixture of liquid water and vapor at 100C with 12.3 percent quality. The mixture is then heated until its temperature is 180C. Calculate the heat transfer required for this process.

1- what is the effect of water vapor on the air entering the alveoli?

A tank contains 21 kg of dry air and 0.3 kg of water vapor at 30°C...

A tank contains 21 kg of dry air and 0.3 kg of water vapor at 30°C and 100 kPa total pressure. Determine (a) The specific humidity (b) The relative humidity (c) The specific enthalpy of the mixture in the tank as (kJ/kg-mixture) (calculate by hand) (d) The specific enthalpy of the mixture in the tank as (kJ/kg-dry air) (calculate by hand) (e) Explain (in 1-2 sentences) the difference between the values in c and d – which value agrees with...

“Dry air” is defined as air with no water vapor, and the molecular weight of air,...

“Dry air” is defined as air with no water vapor, and the molecular weight of air, Mair = 28.97 kg/kmol, is for dry air (zero humidity). “Wet air” is typically defined as air with 100% humidity. (a) Calculate the mol fraction of water vapor in wet air at STP conditions. Give your answer in units of PPM to three significant digits. (b) Compare the molecular weight of dry air and wet air at STP conditions. Which air is heavier? Explain....

A person inhales air richer in O2 and exhales air richer in CO2 and water vapor....

A person inhales air richer in O2 and exhales air richer in CO2 and water vapor. During each hour of sleep, a person exhales a total of 300. L of this CO2-enriched and H2O-enriched air. (a) If the partial pressures of CO2 and H2O in exhaled air are each 20.0 torr at 26.5°C, calculate the masses of CO2 and of H2O exhaled in 1.00 hour of sleep. CO2 ___ ?g H2O_____ ?g (b) How many grams of body mass does...

A water sample contains 150 mg/L ethylene glycol (C2H6O2) and 200 mg/L phenol (C6H6O). Calculate the...

A water sample contains 150 mg/L ethylene glycol (C2H6O2) and 200 mg/L phenol (C6H6O). Calculate the COD and TOC.

A tank contains 70 kg of salt and 2000 L of water. Water containing 0.4kg/L of...

A tank contains 70 kg of salt and 2000 L of water. Water containing 0.4kg/L of salt enters the tank at the rate 16L/min. The solution is mixed and drains from the tank at the rate 4L/min. A(t) is the amount of salt in the tank at time t measured in kilograms. (a) A(0) = (kg) (b) A differential equation for the amount of salt in the tank is =0=0. (Use t,A, A', A'', for your variables, not A(t), and move everything...

A 1.000 L river water sample contains [Ca2+] = 5.6 x 10-3 M, and no other...

A 1.000 L river water sample contains [Ca2+] = 5.6 x 10-3 M, and no other hardness ions. (a) What is the hardness (in ppm CaCO3) of this sample? (b) Assuming the sample is saturated in CaCO3, what is [CO32-] in the sample? (c) Assuming the only other ion present is HCO3-, what is its concentration? (d) Assuming that all the Ca2+(aq) in this sample originally came from CaCO3 dissolution, what mass of CO2 dissolved in this sample, to give...

A sample of water in the vapor phase (no liquid present) in a flask of constant...

A sample of water in the vapor phase (no liquid present) in a flask of constant volume exerts a pressure of 403 mmHg at 99°C. The flask is slowly cooled. i) Assuming no condensation, use the Ideal Gas Law to calculate the pressure of the vapor at 91°C; at 75°C. ii) Will condensation occur at 91°C? 75°C? iii) On the basis of your answers in i) and ii), predict the pressure exerted by the water vapor in the flask at...

The vapor pressure of water at 45oC is 71.88 mmHg. What is the vapor pressure of...

The vapor pressure of water at 45oC is 71.88 mmHg. What is the vapor pressure of a sugar (C12H22O11) solution made by dissolving 54.18 g of sugar in 85.56 g of water?