Part A How long does it take a person at rest to breathe one mole of...

Part A

How long does it take a person at rest to breathe one mole of air if the person breathes 84.0 mL/s of air that is measured at 25 ∘C and 755 mmHg? Express your answer numerically in seconds.

Part B

Typically, when a person coughs, he or she first inhales about 2.50 L of air at 1.00 atm and 25 ∘C. The epiglottis and the vocal cords then shut, trapping the air in the lungs, where it is warmed to 37 ∘C and compressed to a volume of about 1.70L by the action of the diaphragm and chest muscles. The sudden opening of the epiglottis and vocal cords releases this air explosively. Just prior to this release, what is the approximate pressure of the gas inside the lungs?

Express your answer numerically in atmospheres.

Part C

Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles) of He is present in a helium-oxygen mixture having a density of 0.508 g/L at 25 ∘C and 721 mmHg?

Express your answer numerically as a percentage.

Solutions

Expert Solution

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

How long will it take her to rotate the sphere one time, starting from rest?

There is a girl pushing on a large stone sphere. The sphere has a mass of 8200 kgand a radius of 90 cm and floats with nearly zero friction on a thin layer of pressurized water. Suppose that she pushes on the sphere tangent to its surface with a steady force of F = 30N and that the pressured water provides a frictionless support. 1) How long will it take her to rotate the sphere one time, starting from rest?...

Part A How long does it take for the radioactive isotope to decay to 6.0×10−4 μg...

Part A How long does it take for the radioactive isotope to decay to 6.0×10−4 μg ? (Assume no excretion of the nuclide from the body.) Part B A radioactive sample contains 1.70 g of an isotope with a half-life of 3.6 days. What mass of the isotope will remain after 5.8 days? (Assume no excretion of the nuclide from the body.) Part C A mammoth skeleton has a carbon-14 decay rate of 0.46 disintegrations per minute per gram of...

How long does it take for an investment to double in value if it is invested...

How long does it take for an investment to double in value if it is invested at 15?% compounded monthly??Compounded? continuously?

What are the phases of fracture healing? How long does each stage take for a long...

What are the phases of fracture healing? How long does each stage take for a long bone vs a distal/small bone? How will this knowledge come into action when working with orthopedic patients?

How long does it take to reduce the capacitor's charge to 10 μC?

A 20 μF capacitor initially charged to 25 μC is discharged through a 1.5 kΩ resistor. Part A How long does it take to reduce the capacitor's charge to 10 μC?

How long does it take to reduce the capacitor's charge to 5.00 µC?

A 10.0 µF capacitor initially charged to 30.0 µC is discharged through a 1.50 kO resistor. How long does it take to reduce the capacitor's charge to 5.00 µC?

How long does it take for an investment of P800,000 for a new product to earn...

How long does it take for an investment of P800,000 for a new product to earn P600,000 if it is expected to yield a 15% per year compounded annually? If the manager requested simple interest instead, would there be a difference?

If an object is projected at a given angle and speed, how long does it take...

If an object is projected at a given angle and speed, how long does it take to reach its maximum height? Please explain in simplest terms and give an example using units given.

QUESTION 1 How long? How much time in seconds does it take for the sled to...

QUESTION 1 How long? How much time in seconds does it take for the sled to go down part of a hill? A sled with a total mass of 671 kilograms is going down a straight part of a hill where the angle of incline is 10.6 degrees. The length of the straight part of the hill is 76.4 metres. The speed of the sled at the top of the hill is 4 meters per second. The combined forces of...

How long does it take the Sun to melt a block of ice at 0∘C with...

How long does it take the Sun to melt a block of ice at 0∘C with a flat horizontal area 1.0 m2 and thickness 1.9 cm ? Assume that the Sun's rays make an angle of 32 ∘ with the vertical and that the emissivity of ice is 0.050. Express your answer to two significant figures and include the appropriate units.

Subjects