Gas volume in the lungs after exhalation is 3.4 L. The pressure after exhalation matches atmospheric pressure, 1.0 atm. The temperature is at the core human temperature of 37.0 °C. (a) How many moles and molecules of gas are present in the lungs? (b) Using gas under the same conditions (but not in the lungs) , what would be the final temperature if the gas pressure was raised to 1.8 atm and the volume was reduced to 3.1 ×10^-3 m3 ?

Q: At a pressure of 1 atm and a temperature of 20oC, dry air has a density of 1.2256 g/L. What is the…

A:

Q: A balloon is filled with helium gas (see an illustration below). Indicate whether the volume of the…

A: A balloon is filled with helium gas (see an illustration below). Indicate whether the volume of the…

Q: Elemental iron reacts with water to form iron (III) oxide and hydrogen gas. Write the balanced…

A: a.) First we need to write the balanced chemical reaction.  b.) Using the gas equation we can see…

Q: A sample of hydrogen gas was collected by displacement of water in a large gas buret. The total…

A: Given, Total pressure = 764.2torr. Temperature = 23.0oC. Volume of gas = 511mL. Vapor pressure of…

Q: (a) Calculate the density of NO2 gas at 0.970 atm and 35 °C. (b) Calculate the molar mass of a gas…

A: (a). Using the ideal gas equation, the concentration of NO2 is determined as,

Q: mixture at 1.137 atm is composed of three gases. If the mole fraction of gas A is 0.396 and the mole…

A: From Dalton's law of partial pressure the total pressure exerted by a mixture of gases is the…

Q: The reaction of 50 mL of N2 gas with 150 mL of H2 gas to form ammonia via the equation:…

A:

Q: Q1.A glass vessel was filled with an unknown quantity of nitrogen gas and the pressure at 28°C was…

A: Hii there, since there are multiple questions posted. We are answering first question. If you need…

Q: Suppose a sample of refrigerant gas consisting of a simple mixture of the gases pentafluoroethane…

A: Given : Density = 2.30 g/L  Pressure = 0.337 atm

Q: 3. In Santa Monica, a sample of dry hydrogen gas inflates a balloon to 43.0 mL at 761 torr…

A: According to the Boyle's law, the pressure (p) of a given quantity of gas varies inversely with its…

Q: At an altitude of 11,000 m (a typical cruising altitude for a jet airliner), the air temperature is…

A:

Q: What volume of oxygen at 26.3 degrees C and 1.1 atm is needed to completely react via combustion…

A:

Q: A) A sample of ideal gas at room temperature occupies a volume of 40.0 L at a pressure of 542 torr .…

A: Boyle’ law states that at a particular temperature and number of moles, the pressure of a gas is…

Q: A sample of gas contains 0.1600 mol of HBr(g) and 0.08000 mol of Cl₂ (g) and occupies a volume of…

A: Information

Q: Given that a bomb calorimeter has a volume of 1.5 L and a temperature of 25.00°C, what pressure of…

A: The chemical equation of combustion of sucrose is written as: C12H22O11 +12 O2→12CO2+11 H2O

Q: Calculate the following quantities for an ideal gas: The absolute temperature of the gas at which…

A: Given, Number of moles of gas = 3.75 x 10-3 moles Temperature = ? Pressure of gas = 0.945 atm Volume…

Q: 14)a) A sample of neon gas occupies a volume of 50.00L at 27.00C and 10.0 atm. How many moles of…

A:

Q: A helium balloon, assumed to be a perfect sphere, has a radius of 27 cm. At room temperature (20…

A: Fpr perfect gas : PV = nRT P = pressure of gas V = volume of gas R = gas constant T = temperature  n…

Q: A gas mixture contains 14.4 mol of NO and 6.25 mol of Br2.(a) Compute the mole fraction of NO in the…

A: a) The mole fraction of a species is defined as the number of moles of that species in the mixture…

Q: At 1450. mmHg and 286 K, a skin diver exhales a 208-mL bubble of air that is 77% N2, 17% O2, and…

A: The effect of pressure and temperature is measured by Boyle’s law and Charles's law respectively.…

Q: Use the References to access important values if needed for this question. Sodium metal reacts with…

A: The pressure of the wet hydrogen gas is the sum of the pressure of the dry hydrogen gas and the…

Q: Isooctane (C8H18) is the primary component of gasoline, which burns according to the reaction below.…

A:

Q: Consider the reaction of 1.41 g Ca(s) with 107 mL of 0.325 M HBr(aq) according to the following…

A: The reaction taking place is given as, => Ca (s) + HBr (aq) -----> CaBr2 (aq) + H2 (g) Given :…

Q: The oxidation of trichloroethane results in the following reaction equation: 4 CaH,C|a() + 11 0, (g)…

A:

Q: Part A What volume of O2 at 722 mmHg and 21 °Cis required to synthesize 22.5 mol of NO? Express your…

A: Given that: pressure, P = 722 mmHg = 722760= 0.95 atm temperature, T = 21 oC = 21 + 273 = 294 K…

Q: 2. Equal molar quantities of two gasses of molecular weight 4 and 40 are mixed. The pressure of the…

A:

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

A:

Q: The air all around us is a mixture of gasses containing nitrogen, oxygen, carbon dioxide, argon and…

A: Given: The partial pressures of N2, O2, CO2, Ar, H2O vapors as: 1. pN2 = 5.6 atm 2. pO2 = 828 mmHg…

Q: Suppose a sample of helium gas at 45.0 °C sealed in a flask at a pressure of 5.63 atm was found to…

A: Before drying (Contaminated sampple): Temperature, T = 45 oC + 273.15 = 318.15 K  Pressure (He +…

Q: Carbon monoxide gas reacts with hydrogen gas to form methanol via the following reaction:…

A:

Q: The volume of a sample of pure HCI gas was 239 mL at 24°C and 177 mmHg. It was completely dissolved…

A: Given that, Volume of HCl gas =239mL = 0.239LPressure  P = 177 mmHg *                     = 0.233…

Q: Partial pressures The scene below depicts a mixture of four gases. (1) Which gas has the highest…

A:

Q: Iron reacts with excess aqueous hydrochloric acid to produce hydrogen.(a) Write a balanced chemical…

A: a) Iron reacts with aqueous hydrochloric acid to form hydrogen gas and ferric chloride as the major…

Q: What is the maximum number of balloons that can be inflated? Assume that the gas in the cylinder is…

A:

Q: A gaseous "CFC" compound has a density of 5.456 g/L at 0.993 atm and 22.0°C. (a) Calculate the molar…

A: Given , density of CFC =5.456gL Pressure = 0.993 atm temperature, T=22°C =(22+273)K=295 K

Q: What is the concentration of CO2 in such air in terms of molarity, assuming 1 atm pressure and a…

A: Given: Pressure = 1 atm Temperature = 37 oC = 37+273.15 = 310.15 K   1 mole of any ideal gas…

Q: A gas sample containing 0.6838 moles is trapped in a chamber with a volume of 7.557 liters.  If the…

A: n = 0.6838 molV = 7.557 LT = 298.17 K

Q: The barometric pressure measured outside an airplane was 245 mmHg. Calcuate this pressure in kPa.

A: Physical chemistry.

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.