A mixture of chromium and zinc weighing 0.363 grams was reacted with excess HCl. After all the metal had reacted, 158 ml of dry hydrogen gas was collected at 27°C and 750 torr. Assuming that both metals react with the HCl as single displacement reactions, determine the mass of zinc in the sample.

Q: A sample of neon gas occupies a volume of 7.62 L at 57.0°C and 374 torr. If the volume of the gas…

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Q: A 6.35 L sample of carbon monoxide is collected at 55 °C and 0.892 atm. The volume (in L) that the…

A: Given,Initial volume of carbon monoxide = 6.35 LInitial pressure of carbon monoxide = 0.892…

Q: A sample of gas occupies a volume of 101 mL at 220.0 torr and 30.5˚C. Calculate the volume at 500.0…

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

Q: Two samples of gas are separated in two rectangular 1.00 -L chambers by a thin metal wall. One…

A: Given: Volume = 1.00 L = 0.001 m3 Temperature =27oC = 27+273K = 300 K Pressure= 2.00 x 10-6 atm…

Q: In a particular gas mixture containing noble gases, there were 0.20 moles of Ne, 0.10 moles of He,…

A: The moles of gases as follows:Total pressure of the mixture = 800 mmHgThe partial pressure of the Ne…

Q: e identity of the gas?

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Q: 0.9110 grams of an unknown gas was placed into an evacuated 0.500 L container. The temperature was…

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Q: The mass of an evacuated 260 mL flask is 143.217 g. The mass of the flask filled with 268 torr of an…

A: The objective of this question is to calculate the molar mass of an unknown gas given the mass of an…

Q: Calculate the partial pressure of a hydrogen gas sample collected over water at 30 degree C if the…

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Q: A sample of helium gas at a pressure of 727 torr and a temperature of 23.8°C, occupies a volume of…

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Q: Consider a sample of argon gas at 20.0ºC, 2167 mm Hg, and 1,450 mL. How many moles of argon are in…

A: Given, Pressure of argon gas (P) = 2167 mmHg = 2.85 atm Volume of argon gas (V) = 1,450 mL = 1.45 L…

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

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Q: A 45 mL sample of a dry gas is collected at 380 torr and 25 °C. Calculate the volume of the gas…

A: Given  Volume of dry gas ( V ) =  45 mL                                        =  0.045 Liter…

Q: Chlorine pentafluoride gas is collected at 9.0°C in an evacuated flask with a measured volume of…

A: Given :-  pressure of gas = 0.410 atm  volume occupied by gas = 5.0 L  temperature = 9.0°C  To…

Q: Consider a sample of argon gas at 375ºC, 382 mm Hg, and 425 mL. How many moles of argon are in this…

A: Given, Temperature = 375°C Pressure = 382 mmHg  Volume = 425 mL  Number of moles = ?

Q: A 22.0-gram sample of impure sodium chlorate was heated until decomposition was complete. The…

A: mass percent of any compound in the sample is the ratio of the the mass of that compound to the…

Q: Consider the acid dissociation behavior of carbonic acid, H,CO,. pKa1 = 6.351 pK2 = 10.329 . O co²-…

A: Given data : pKa1 = 6.351 pKa2 = 10.329

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: An old 0.500 L lecture bottle of hydrogen chloride (HCl) was found in a lab and needed for a…

A: Answer :-  Mass of gaseous hydrogen chloride, HCl was left in the lecture bottle = 3.55 g…

Q: sample of helium gas at a pressure of 640. torr and a temperature of 29.9°C, occupies a volume of…

A: The question is based on the concept of Boyle's law.   it states that for a given amount of gas , at…

Q: A sample of nitrogen gas occupies a volume of 7.76 L at 63.0°C and 379 torr. If the volume of the…

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Q: 0.9110 grams of an unknown gas was placed into an evacuated 0.500 L container. The temperature was…

A: The ideal gas equation is  PV = nRT  PV = (m/M)RT P = pressure  V = volume  n = moles of gas = mass…

Q: 8.00 gram mixture of copper (II) sulfide and iron (II) sulfide reacted with

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Q: Since helium is lighter than air, it is difficult to measure the mass of a sample, so to find out…

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Q: In an experiment the rate of effusion of a sample of argon is determined to be 1.50 L/min.  Under…

A: According to Graham's law of diffusion or effusion, rate of diffusion or effusion of gas is…

Q: A particular gaseous hydrocarbon has a density of 2.33g/L at 23oC and 746mmHg.  Calculate the molar…

A: Introduction:- the molar mass of the gas can be find by using ideal gas equation which is as- P×V…

Q: A gas sample collected at 25.0°C and a pressure of 740 torr has a volume of 200 mL. The temperature…

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Q: A sample of krypton gas occupies a volume of 6.80 L at 65.0°C and 390. torr. If the volume of the…

A: Given  Initial Pressure (P1)  =390 torr Initial Temperature (T1)  = 65 ℃…

Q: A sample of neon gas occupies a volume of 8.35 L at 54.0°C and 373 torr. If the volume of the gas…

A: Given: P1 = 373torr V1 = 8.35 L T1 = 54o C = 54.0 + 273.15 = 327K P2 = ? V2 = 11.2 L T2 = 4  C = 4…

Q: A mixture of neon and argon gases is maintained in a 7.63 L flask at a pressure of 3.55 atm and a…

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Q: A sample of helium gas at a pressure of 673 torr and a temperature of 24.8 celcius , occupies a…

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Q: Initially 4.00 L NO at 0.500 atm and 2.00 L O2 at 1.00 atm are in different bulbs separated by a…

A: partial pressure of NO2 is 0.333 atmExplanation:Given data:For NO: P=0.5 atm, V = 4LFor O2: P=1 atm,…

Q: A sample of Ne at 550 torr and 25°C is placed in an evacuated 5.0 L flask. The gas sample is heated…

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Q: A gas is formed in the reaction shown below. The gas laws can help determine the volume of gas…

A: recall ideal gas equation       PV=nRTHere, conditions of STP is used       So pressure of gasP=1…

Q: A 1.37 mol sample of xenon gas is collected at a pressure of 479 mmHg and a temperature of 6.0°C.…

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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.