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- The tidal lung volume of human breathing, representing the amount of air inhaled and exhaled in a normal breath, is 500 cm3. (Assume atmospheric pressure.) (a) What is the number of molecules of air inhaled with each human breath when the air temperature is 27.0°C?The tidal lung volume of human breathing, representing the amount of air inhaled and exhaled in a normal breath, is 500 cm³. (Assume atmospheric pressure.) (a) What is the number of molecules of air inhaled with each human breath when the air temperature is 25.0°C? molecules (b) If the molar mass of air is 28.96 g/mol, what is the mass (in g) of air molecules inhaled with each breath? (Assume the air temperature is 25.0°C.) g (c) It has been calculated that all of the air in Earth's atmosphere could be collected into a sphere of diameter 1,999 km at a pressure of 1.00 atm. What is the mass (in kg) of the air in Earth's atmosphere? (Assume the density of air used in this calculation was 1.225 kg/m³.) kg (d) If all 7 billion humans on Earth inhaled simultaneously, what percentage of the atmosphere would be inhaled during this process? (Assume the air temperature is 25.0°C everywhere on Earth.) %Estimate the number of people in the world who are suffering from the common cold on any given day. (Remember that a person suffers from a cold for about a week, and assume that the average person catches a cold twice a year. The population of Earth is approximately seven billion.) O 10² O 105 O 108 O 10¹3
- Assuming the human body is primarily made of water, estimate the number of molecules in it. (Note that water has a molecular mass of 18 g/mol and there are roughly 1024 atoms in a mole.)A given gas is heated from 273 K to 546K, while its volume is doubled. If initially the gas pressure is 4 x 105 Pascal, the final pressure is: A-P = 4 × 105 Pascal B- P = 2 x 105 Pascal C- P = 1 × 105 Pascal D- P = 0.5 x 105 Pascal E- P = 0.25 x 105 Pascal O A Ос D ОЕAssuming the human body is primarily made of water, estimate the number of molecules in it. (Note that water has a molecular mass of 18 g/mol and there are roughly 1024 atoms in a mole)
- A modern-day zeppelin holds 9,480 m3 of helium. Compute its maximum payload at sea level. (Assume the helium and air to be at 0°C and 1 atm.)Answer in NCalculate: (a) the number of moles in 1.00 m3 of gas at STP, and (b) the number of liters of gas per mole.The pressure, P of an ideal gas, can be expressed as P = nRT/V where n is the number of moles, T is the temperature, V is the volume and R = 8.314JK^-1 mol^-1 is the ideal gas constant. a) Find the expression for deltaP in terms of deltan, deltaT and deltaV: deltaP = deltan + deltaT + deltaV b) Suppose that n = 1, V = 1m^3 and T = 300K initially. If n and V change to 9/5 and 7/10m^3 respectively, estimate the change in T(K) required to keep P constant.
- The solar panels are placed in an optimal position such that they receive a solar power of 1186kWh/m^2 per year1. The average solar cell has an efficiency of 20% and an average household in the Netherlands uses 2990kWh of electricity per year. The average solar panel has dimensions of 165x99cm. How many solar panels do you need?p lease just part bfind Afgr Afarg for the revearible 3.000 moy frgon ideal) from 9 Yolume Q yoluma and sU othermal expenolon Cassumed to 100.02 익. of 500.0L at 298.15 R
