Question

What is the density (in kg/m3) of nitrogen gas (molecular mass = 28 u) at a pressure of 2.0 atmospheres and a temperature of 310 K?

Answer #1

⦁ A gas with a molecular weight of 28.0, a critical
temperature of 300 K, and a critical pressure of 4.0 KPa. Calculate
the density in kg/m3 of this gas at 450 K and 8.0 KPa
⦁ if the gas is ideal
⦁ if the gas obeys the law of corresponding
states.

If the molecular weight of air is 28.9, what is the density of
air at atmospheric pressure and a temperature of 368.7 K? 1 atm =
1.013×105 N/m2, the mass of a proton is 1.67262 × 10?27 kg ,
Avogadro’s number is 6.02214 × 1023 mol?1 and k = 1.38065 × 10?23 N
· m/K . Answer in units of kg/m3.

If 100 g of air consists of 77% by weight of nitrogen (N2,
molecular weight = 28), and 23% by weight of oxygen (O2, molecular
weight = 32), calculate (a) the mean molecular weight of air, (b)
mole fraction of oxygen, (c) concentration of oxygen in mol/m3 and
kg/m3, if the total pressure is 1.5 atm and the temperature is
25°C.

Consider a gas of nitrogen molecules at 20°C with a particle
density of 2.7 ×1019 molecules/cm3. The molar mass of
nitrogen molecules is 28 g/mol.(a) What is the rms speed of the
nitrogen molecules?(b) At what temperature will the rms speed be
half that value?(c) What is the average translational kinetic
energy of these molecules at 20°C? (d) The mean free path of the
nitrogen molecules is 0.80×10−5 cm. What is the molecular radius of
a nitrogen molecule?

Consider a typical adult weighing 165.0 lb and possessing a
density of 987.0 kg/m3. What is the minimum pressure
(atm) drop necessary to measure the person's density if the weight
scale can only measure to the nearest 0.20? Assume air is an ideal
gas, and the chamber is maintained at standard temperature as the
air is evacuated. The density of air at sea level is roughly 1.22
kg/m3.

Molecular masses for O2 and N2 are 32 u and 28 u,
respectively.
a) What is the ratio of the root mean square speeds of oxygen to
nitrogen at 30 ◦ C?
b) What is the ratio at 98 ◦ C?

1. A crane lifts a steel submarine with a density of 8,050 kg/m3
and a mass of 25,000 kg. It is moved as a constant speed (which
means the net force equals??). What is the tension in the lifting
cable? The density of the water is 1030 kg/m3.
2. An Airbus A490 aircraft (which may not actually exist) is a
massive plane. It has a mass of 600,000 kg and a wing area of 875
m2. The density of air...

The mass of nitrogen at 20 Celsius and two atmospheres of
pressure occupies a volume of 800m^3. What is the variation of
volume produced when heated isobaric until 156.6 Celsius? What is
the variation of pressure produced from the gas if the gas is
heated until the same temperature but with constant volume?

A block of wood has a mass of 3.67 kg and a density of 594 kg/m3
. Attached below the wood is a mass of lead. If the wood is to
float in water with 0.883 of its volume submerged, what mass of
lead will be needed? (Density of lead is 11.3x103 kg/m3 )

please show all steps.
2.5 kg of nitrogen gas with an initial temperature of 300 K and
pressure of 100 kPa is compressed to a higher pressure. The
internal energy change during this process is 70 kJ/kg. Determine
the final temperature of the nitrogen. Please perform at least two
iterations with average specific heats.

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