An organic chemist isolates a colorless liquid from a petroleum sample. She uses the Dumas method and obtains the following data Volume (V) of flask=213 mL T=100.0°C P=754 torr Mass of flask+gas=78.416 g Mass of flask=77.834 g Calculate the molar mass of the liquid

Q: White phosphorus melts and then vaporizes at high tempera-ture. The gas effuses at a rate that is…

A: The Scottish physical chemist Thomas Graham gives direct relation between rate of effusion of gas…

Q: 1.00 mmol of nitrogen gas takes 60.9 min to effuse through a small hole. Based on your calculation,…

A: The rate of effusion can be calculated as the volume or number of moles of gas escaping through a…

Q: A piece of dry ice (solid carbon dioxide) with a mass of 5.50 g is placed in a 10.0 L vessel that…

A: Total pressure :- 1.233 atm

Q: Which statement is not consistent with kinetic Molecular Theory? O The volume of the gas particles…

A: Here, we have to find the statement from the given statements that is inconsistent with kinetic…

Q: Calculate the density of nitrogen dioxide gas at 765 Torr and 20oC. (d=gL^-1)

A: The density of the gas and formula weight calculated in below by using ideal gas equation. PV = nRT…

Q: A sample of a gas weighs 2.85 g and has a volume of 1001 mL at 715.0 torr and 20.0 °C. What is its…

A: The given mass of a sample of gas is 2.85 g. The given pressure is 715.0 torr.It is known that 1…

Q: Is the rate of effusion of a gas higher than, lower than, or equal to its rate of diffusion?…

A: Diffusion of a gas is a phenomenon by which the molecules of gases mix gradually because of the…

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: A sample of gas contains 0.1800 mol of NH3(g) and 0.2250 mol of 02(g) and occupies a volume of 17.6…

A: The change in temperature, pressure, volume and number of moles of an ideal gas is given by ideal…

Q: White phosphorus melts and then vaporizes at high temperature. The gas effuses at a rate that is…

A: The number of atoms in molecule of white phosphorus has to be calculated.

Q: Part C - Which of the follwing statements is not consistent with the postulates of the kinetic…

A: According to the Postulates of  kinetic molecular theory for gases -  1. Every gas consists of a…

Q: The number of oxygen molecules striking 1 cm x 1 cm area in 1 s at a pressure of 10-6 Torr at 298 K…

A:

Q: a scuba diver exhales 1.85 L of air while swimming at a depth of 65.70 m where the sum of…

A:

Q: partial pressures

A: According to Dalton's law,  Total pressure exerted by gas mixture = the sum of partial pressure of…

Q: Which of the following assumptions is or are valid based on kinetic molecular theory? I. Gas…

A:

Q: Small amounts of oxygen can be generated by the thermal decomposition of KClO 3; 2 KClO 3(s) ↔ 2…

A: The balanced equation is 2 KClO 3(s) ↔ 2 KCl(s) + 3 O 2(g) Number of moles of KClO3= mass/mol.wt.=…

Q: A sample of carbon dioxide diffused in 100 seconds. Under the identical set of conditions, a sample…

A: According to Graham's law, the rate of diffusion of a gas is inversely proportional to the square…

Q: At a temperature of __________°C, 0.444 mol of CO gas occupies 11.8L at 848 torr.   a). 379 b).…

A: Pressure of the gas can be determined by using very famous Ideal Gas Equation : P x V = n x R x T…

Q: Use the data below to calculate the volume of the gas at STP (standard temperature and pressure)…

A: One mole of a gas under STP conditions occupies volume 22.4 L. Therefore, mass of 22.4 L of a gas…

Q: Carry out the following unit conversions: 1.26 atm %3D 958 torr 740 torr %3D 0.97 atm 738 torr 738…

A: We have given the unit conversion we have to complete the unit conversion.

Q: A mixture contains O2 at 700. torr pressure, F2 at 900. torr pressure, and Cl2 at 400. torr…

A: Given that, Pressure of O2=700 torr pressure of F2=900 torr pressure of Cl2=400torr then,

Q: A 0.619 g0.619 g sample of cobalt, Co,Co, is added to 229 mL229 mL of 0.100 M H2SO40.100 M H2SO4 and…

A: The balanced reaction taking place is given as, => Co (s) + H2SO4 (aq) → CoSO4 (aq) + H2 (g)…

Q: A 144.6 mL sample of O2 gas at 509.6 torr is compressed at constant temperature to 87.5 mL. Predict…

A:

Q: what is the answer of Hydrogen gas is generated when acids come into contact with certain metals.…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: The mass of an evacuated 255 mL flask is 143.187 g. The mass of the flask filled with 267 torr of an…

A:

Q: A gas occupies 256 mL at 720 torr and 25°C. What will its volume be at STP?

A:

Q: Calcium perbromate, Ca(BrO,), (m.w.= 327.9 g/mol) decomposes upon heating to release oxygen gas…

A:

Q: flourine gas exerts pressure of 297 torr when the volume changes to 250 mL at STP.what was the…

A:

Q: Small amounts of oxygen can be generated by the thermal decomposition of KClO 3; 2 KClO 3(s) ↔ 2…

A:

Q: 10. The volume of nitrogen, collected over water, is 247 mL at 25°C and 700.0 torr. Calculate the…

A: Using ideal gas equation , PV=nRT And at STP , T=273 K , P= 760 Torr V=??

Q: Ammonia is created in the Haber process in a rigid container (nitrogen gas plus hydrogen gas react…

A: The chemical reaction between hydrogen and nitrogen to produce ammonia: 3H2+N2→2NH3

Q: Which of the following statements is true? a) At a given temperature, lighter gas particles travel…

A: Kinetic theory of gases: According to Kinetic theory of gases, Gas molecules have negligible volume…

Q: A mixture contains O2 at 700. torr pressure, F2 at 600. torr pressure, and Cl2 at 400. torr…

A: Given that, PO2=700 torr, PF2=600 torr PCl2=400 torr

Q: A sample of H2 gas was collected over water at 25.0 ºC and 760. torr. What is the partial pressure…

A: The total pressure of the gas at 25.0oC is = 760 torr The vapour pressure of water at 25.0oC is =…

Q: Rubber balloons filled with helium don't last as long as those filled with nitrogen or air because…

A: Helium (He) is a noble gas that is it consists of full valence electrons in its outermost shell (2…

Q: The density of a gas is 1.74 g/L at 31oC and 592 torr.  Calculate the molar mass of this gas. R =…

A:

Q: A sample of Chlorine, Cl2, was found to effuse through a pinhole 1.25 times as rapidly as the same…

A:

Q: Consider three 1-L flasks at STP. Flask A contains NH3 gas, flask B contains NO2 gas, and flask C…

A:

Q: A student decomposes KClO3 and collects 36.5 cm3 of O2 over water at 23 Celcius. The laboratory…

A:

Q: Q1. An organic chemist isolates a colourless liquid from a petroleum sample. She places the liquid…

A: Solution - According to the question - Given -  P = pressure = 754 torr = 0.992atm V = Volume =…

Q: A apecified quantity of an unknown gas has volume of 17.3 ml at 25 degrees celcius and 660 torr.…

A:

Q: Acetylene, C2H2, is produced in the laboratory when calcium carbide, CaC2 reactswith water according…

A: The given reaction is : CaC2 + 2H2O -----------------> C2H2 +Ca(OH)2 The total pressure is the…

Q: Consider the arrangement of bulbs shown in the drawing. Each of the bulbs contains a volume of gas…

A: Given that -  Partial pressure of nitrogen gas , PN2 = 695 torr  Partial pressure of neon gas , PNe…

Q: A student was assigned the task of determining the molar mass of an unknown gas. The student…

A: 1) mass of   density = massvolumemass = density × volumemass = 1.18 gL× 0.843 Lmass = 0.995 g mass…

Q: An expandable balloon filled with 100.0 L of helium at 750 torr and 20°C is launched from ground…

A: As per the given data in the question,P1 = 750 torr; V1 = 100.0 L; T1 = 20 + 273 = 293 KP1 = 190…

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.