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: 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: Calculate the density of Xenon gas (in g/L) at 23.0oC and 700.0 torr.

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Q: (a) What is the total volume of gaseous products,measuredat 350C and 735 torr, when an automobile…

A: (A) The component of gasoline, i.e. the octane (C8H18) when burnt in presence of oxygen, it gives…

Q: 2K(s)+2H2O(l)→2KOH(aq)+H2(g) If 0.350 g of potassium reacts with an excess amount of water, what…

A: Given, the chemical reaction as follows,2K(s)+2H2O(l)→2KOH(aq)+H2(g)amount of potassium for rection…

Q: 50.0 mL of 6.0 M acetic acid reacts with 1.55 g magnesium. what volume of hydrogen gas will be…

A: Stoichiometry, the essential technique widely utilized for obtaining product's amount by relating…

Q: A sample of hydrogen gas occupies a volume of 8.58 L at 58.0°C and 327 torr. If the volume of the…

A: Given  V1 = 8.58 L  T1 = 58°C + 273.15 = 331.15K P1 =327 torr = 327/760 atm = 0.43 atm  V2 = 10.5 L…

Q: A 2.50 g sample of solid potassium chlorate is decomposed according to the following reaction. If…

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Q: Consider the flask apparatus in the following diagram, which contains 2.00 L of H2 at a pressure of…

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

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: A cylinder contains a mixture of 2735 grams of carbon dioxide and oxygen, if the volume of the…

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

Q: Calculate the density of argon gas at 23.0 oC and 784 torr.

A: Given, Temperature of Ar gas = 23.0oC = 296K. Pressure of Ar gas = 784torr.

Q: A 3.76 g sample of a noble gas is stored away in  a 2.00 L object at 874 torr and 25 degrees…

A:

Q: When zinc metal reacts with excess aqueous hydrochloric acid, zinc chloride is formed along with…

A: Given :-  Volume of H2 gas = 750 mL  Temperature = 30°C  Pressure = 742 torr  To calculate :-…

Q: Calculate the density of sulfur hexafluoride gas at 703 torr and 21 °C. Express the density in grams…

A: Given, Gas = sulfur hexafluoride pressure =703 torr temperature =21°C=(21+273)K=294 K

Q: The gas in the reaction flask is brought to the same atmospheric pressure as the surroundings, 743.9…

A:

Q: A 240. mL sample of an unknown gas at 99C and 722 torr has a mass of 1.20 g. Calculate the molar…

A: Given,Temp= 99 degree Celsius.Pressure = 722 torrMass = 1.20gVolume = 240mL

Q: Calculate the molar mass of a gas with a density of 1.81 g/L at 27 oC and 735 torr.

A: Mass = m Molar mass = M Volume = V Density, d = 1.81 g/L Temperature = 27 ◦C or 300.15 K Pressure =…

Q: How many grams of solid calcium carbonate must decompose to produce solid calcium oxide and 526.0 mL…

A: The amount of solid calcium carbonate decomposed is to be calculated.

Q: Small quantities of hydrogen gas can be prepared by the addition of hydrochloric acid to zinc.  A…

A: Total pressure = Pressure of H2 gas + pressure of H2O vapor Therefore, Pressure of H2 gas = Total…

Q: molar mass

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Q: Calculate the density of hydrogen gas (in g/L) at 43.0C and 700.0 torr.

A: Given: Temperature = 43.0 oC = 316 K Pressure = 700 torr = 0.921 atm Molar mass of hydrogen gas (H2)…

Q: Hemoglobin is the protein that transports O₂ through the blood from the lungs to the rest of the…

A: Given,

Q: 250.0 ml of oxygen gas was collected over water at 24.5 C and 771 Torr. What is the volume of the…

A: Since the oxygen is collected over water, total pressure includes vapor pressure of water. From the…

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

A:

Q: A 458.8-ml sample of helium exertsa pressure of 668.8 torr at 25.9 °C. At what temperature in °C…

A: Gases expand supplying temperature. Particles of gases have weak binding forces. Gas particles are…

Q: When 10.33 g of neon is combined in a 20 L container at 99.8oC with 8.24 g of argon, what is the…

A: The molar mass of Neon = 20g/mol The molar mass of Argon = 40g/mol  Total Volume = 20L  T = 99.8oC =…

Q: At 741 torr and 44 °C, 7.10 g of a gas occupy a volume of 5.40 L. What is the molar mass of the gas?

A: Using the ideal gas equation, given the pressure, temperature, mass and volume of the gas, where R…

Q: How many grams of oxygen are collected in a reaction where 240 mL of oxygen gas is collected over…

A:

Q: A sample of gas has a mass of 3.85 g and has a volume of 955.0 mL at 831 torr and 23.0°C. What is…

A: Solution:- Given => mass of gas = 3.85 g                                  volume of gas = 955.0…

Q: A sample of sodium metal is added to water and the hydrogen gas evolved is collected in a gas…

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Q: 7. The volume of a gas-filled balloon is 50.0 L at 20.0∘C and 742 torr. What volume will it occupy…

A:

Q: The air in a bicycle tire is bubbled through water and collected at 25°C. If the total volume of gas…

A: Convert the given pressure in units of atm. Convert given temperature in Kelvin.

Q: Chlorine is widely used to purify municipal water supplies and to treat swimming pool waters.…

A: (a) The grams of Cl2 are in the sample is,The ideal gas equation is,

Q: A student wished to generate hydrogen according to the following:   Zn(s)  +  2HCl(l)  à  H2(g) +…

A:

Q: 2. A 0.0758 gram sample of aluminum metal was reacted with dilute sulfuric acid and the hydrogen…

A: As per the given data,Given mass of aluminum metal = 0.0758 gMolar mass of aluminum metal = 26.9815…

Q: Consider the reaction: 2Na (s) + Cl2 (g)  2NaCl (s) Calculate volume of chlorine gas measured at…

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Q: Consider a room that is 16 ft x 24 ft with a 9.0 ft ceiling. How many molecules of air are present…

A:

Q: A gas sample contains 220.0g Na. What volume would this sample of gas occupy at 25C and 750 torr?

A: We can use ideal gas equation to solve this problem. That is, PV = nRT where, P = pressure V =…

Q: A student wished to generate hydrogen according to the following:Zn(s) + 2HCl(l)  H2(g) +…

A: Reaction: Zn(s) + 2HCl(l) → H2(g) + ZnCl2(aq) In general, 1 mole of Zn reacts with 2 moles of HCl to…

Q: A sample of a gas weighs 4.65 g and has a volume of 1086 mL at 765.0 torr and 21.0 °C. What is its…

A: Given data: Mass of gas = 4.65 g Volume = 1086 mL = 1.086 L Temperature = 21 oC = 294 K Total…

Q: How many grams of solid calcium carbonate must decompose to produce solid calcium oxide and 544.0 mL…

A:

Q: A volume of 495 mL of argon gas was collected at 21.0 oC and 779 torr.  What does this sample weigh?…

A: Given that: Volume of argon = 495 mL = 0.495 L Temperature = 21°C = 294 K Pressure = 779 torr =…

Q: A sample of oxygen gas has a volume of 3.24 L at 31°C. What volume will it occupy at 147°F if the…

A:

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…

Q: A bulb of 138. 2 mL volume contains 0. 6946 g of gas at 756. 2 Torr and 100. 0°c, what is the molar…

A: Mole can be defined as a standard unit for measuring large quantities of very small atoms,…

Q: Gaseous ammonia reacts with gaseous chlorine to produce nitrogen and hydrogen chloride gas. How many…

A:

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.