using the dumas method an unkown compound is first reacted by passage over hot CuO The product gas i then passed through concentrated solution of KOH toremove CO2. After passage through KOH solution, the gas contains N2 and is saturated with water vapor. in a given experiment a 253g sample of a compound produced 31.8 mL saturated with water vapor at 25 C and 726 torr. what is the maa percent nitrogen in the compund.

Q: a) How many moles of Cl2gas occupy a volume of 695 mL at 6.40 atm and 65.0 Celsius?   How many grams…

A:

Q: A compound has the empirical formula CHB.. A 256-mL flask, at 373 K and 750. torr, contains 1.53 g…

A:

Q: Oxygen gas taking up 72.1L at 3.41atm at 255K has what mass?

A: The formula of the ideal gas is :  => PV = nRT  where,  P is the pressure  V is the volume  n is…

Q: sample of gas occupies a volume of 1,400 mL at 25oC and 760 mm Hg. What volume would it occupy at a…

A: As the temperature remains constant, Boyle's law is followed. Thus,  P1V1T1 = P2V2T2 Where T1 and T2…

Q: What volume of oxygen gas at 298K and 680torr will react completely with 5.0L ok co gas at the same…

A:

Q: Argon vapor at 35.2oC and 725Torr is contained in a 2.26-L tube. A 1.731-g sample of C6H6 is then…

A:

Q: A compound has the empirical formula CHC1. A 256-mL flask, at 373 K and 750. torr, contains 0.800 g…

A: Given information:Volume = 256mL=0.256 LTemperature = 373 KPressure = 750 torrMass = 0.800…

Q: A gas mixture contains each of the following gases at the indicated partial pressures N 2 ,216 torr;…

A: Partial pressure of N2 = 216 torr ...Or  because 1 atm = 760 torr  ...so,  = 216 torr × (1 atm / 760…

Q: es 500.0 mL PSTP. uhr f the gas cotracts e is 655 mm Ha?

A: The final temperature will be -155.45oC.

Q: A 2.50 g sample of an unknown gas occupies 875 mL at 685 mm Hg and 35 degrees Celcius. What is the…

A: Given: mass of gas = 2.50 g Volume of gas = 875 mL = 0.875 L pressure of gas = 685 mmHg = 0.9013 atm…

Q: A 0.1804 g sample of an unknown gas has a volume 24.58 mL at 817.3 mm Hg and 31.9o The unknown gas…

A: Volume of sample = 24.58 mL Pressure = 817.3 mmHg Temperature = 31.9°C = 31.9+273.15 =305.05K…

Q: 1. The pressure of a sample of gas is measured with an open-end manometer, partially shown to the…

A: We are authorised to solve only first question at a time. Please post rest of the questions…

Q: Consider the image of a mercury manometer below. Based on the image, if the pressure of the…

A: The absolute pressure or total pressure of any fluid is calculated as follows, Absolute pressure =…

Q: If a gaseous mixture is made of 2.93 g of He and 2.27 g of Ne and is in an evacuated 2.01 L…

A: The product of mole fraction with total pressure gives the partial pressure of a gas. Given volume…

Q: A sample of nitrogen gas is 1.05Lat –58oCand 1 atm. What is the gasvolume when it is heated to…

A: Gien that: P1 = 1 atm, V1 = 1.05 L, T1 = -58 oC = 215 K P2 = P1  = 1 atm, V2 =? , T2 = 100 oC = 373…

Q: A gas sample is under an initial set of conditions (i) and is then changed to a final set of…

A:

Q: A quantity of helium (He) gas occupies a volume of 16.4 L at 76.5 ºC at and 34435 mm Hg. What is its…

A:

Q: An “empty” spray can contains residual propellant gas that has a pressure of 772 torr at 23oC.…

A: Given Information- initial pressure P1 = 772 torr initial temperature T1 = 23o C = 296.15 K final…

Q: Calculate the dednisty of hydrogen bromide(HBr) gas in grams per liter at 661 mmHg and 34 degrees…

A: According to ideal gas law, PV = nRT where P = pressure V = volume n = moles R = gas constant =…

Q: 12.2 ml of carbon dioxide gas is at a pressure of 7.75 x 103 Pa and at a temperature of 25 degrees…

A:

Q: A sample of helium gas occupies a weather balloon to a volume of 699.6mL and -16^(@)C. What is the…

A: Information of question

Q: What is the mass (in grams) of 2.00 L of CH₄ at STP? R = 0.08314 L･bar/mol･K.

A: 1mole=6.022 * 1023particle = molar mass = 22.4L According to ideal gas equation

Q: Cyanogen, a highly toxic gas is composed of 46.29% C and 53.8% N by mass. At 25℃ and 751 torr, 1.05g…

A: We know that PV = nRT  where P = pressure in atm = 751/760 = 0.988 atm                    (since 1…

Q: What pressure (in atm) is exerted by a column of isopropanol (C3H7OH) 303 m high? The density of…

A: Given, Height of column = 303 m Density of isopropanol = 0.785 g/cm3

Q: A sample of fluorine gas occupies a volume of 1550 mL at 690 mm Hg and 155oC.  What is the mass of…

A: The question is based on the concept of ideal gas equation. we have to make use of ideal gas…

Q: What is the mass of chlorine gas present in 17.0 L at a pressure of 98.5 kPa and a temperature of…

A: This problem will be solved using ideal gas equation which is given as PV= nRT  Where, P = pressure…

Q: What is the molar concentration of the cleaning solutionformed when 10.0 L of ammonia gas at 33°C…

A: To determine the number of moles of ammonia gas, we use ideal gas equation, which is: PV=nRT…

Q: What is the pressure of N2 (g)  in Torr if 0.582 atm of O2 (g) and  965Torr of He(g)  are mixed with…

A: Given , Total pressure = 2250 mmHg Since , 1 torr = 1mmHg  So, Total pressure  = 2250 torr Partial…

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.