8.00 gram mixture of copper (II) sulfide and iron (II) sulfide reacted with excess nitric acid and produced 2.113 L of hydrogen sulfide gas at 28 degrees Celsius and 775 mmHg. What is the % mass of copper (II) sulfide and iron (II) sulfide in this mixture? Write reactions for both. If required use stoichiometry or/ and dimensional analysis.

Q: If 0.130 mol of N2 gas effuses through a small hole over the course of one hour, calculate the…

A: A question based on effusion, which is to be accomplished.

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

A:

Q: A 0.112 g sample of gas occupied 81.8 cm3 at temperature 127 °C and a pressure of 1 atm. Calculate…

A: The ideal gas equation, PV = nRT  and n = mass of the gas (m)/Molar mass of the gas (M) PV = (m/M)…

Q: Calculate the molar mass of a gas X2 if equal volumes of X2 and hydrogen gas take 9.12 and  1.20…

A: Given that equal volume of gases X2 and H2 effuse into a vacuum through a small hole under the same…

Q: Nitrogen gas occupies a volume of 1.87 x 102 mL, at 27 oC, and 0.89 atm of pressure.  How much…

A: Formula: P1 V1 = P2 V2

Q: One compound under investigation for use as a lightweight rocket fuel is dimethylhydrazine (60.10…

A: Given reaction is  (CH3)2N2H4(l) + N2O4(l) -----> 3N2(g) + 4H2O(l) + 2CO2(g)  Mass of (CH3)2N2H4…

Q: At 30oC, a gas cylinder containing nitrogen has an internal volume and pressure of 58.5 L and 1.75 *…

A: All matter can be classified as solid, liquid and gases mainly. In these physical states of matter,…

Q: The two isotopes of uranium, 238U and 235U, can be separated by effusion of thecorresponding UF6…

A:

Q: A mixture of calcium carbonate, CaCO3, and barium carbonate, BaCO3, weighing 5.40 g reacts fully…

A:

Q: Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric…

A: According to ideal gas equation PV =nRT where P = pressure V= volume n = number of moles R = gas…

Q: What is the partial pressure of oxygen if the total pressure of wet gas is 705 mmHg, and the oxygen…

A:

Q: When 7.16 g of calcium metal completely reacts with excess water, what is the pressure, in atm, of…

A: Given Weight of calcium=7.16g Volume=2.1L Temperature=306 k To calculate pressure in atm

Q: A mixture of Al and Fe weighing 0.2000 g is treated with excess HCl solution. Each metal reacts…

A: Here we are required to find the mass percentage of Al in the sample.

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

A:

Q: Propane, C3H8(g), is used in gas grills to provide the heat for cooking. What volume of O2(g)…

A: Combustion is a process of burning a material (usually fuel) at high temperature in the presence of…

Q: When 10.33 g of neon is combined in a 20.66 L container at 134oC with 8.59 g of argon, what is the…

A: Given: The given mass of Ne, = 10.33 g. The given mass of Ar, = 8.59 g. The volume of the container,…

Q: What must be the new volume of a sample of nitrogen (in L) if 2.68 L at 745 torr and 24.00C is…

A: Given,Volume of nitrogen sample (V1) = 2.68L.Pressure (P1) = 745torr.Temperature (T1) =…

Q: 4. Calculate the mass of a 4.5 L balloon filled with chlorine gas at 67.0°C and 103.2 kPa?

A: The pressure, volume, temperature and number of moles of a an ideal gas is related to each other by…

Q: Calculate the molar mass of an unknown gas that has a mass of 4.55g, exerts a pressure of 2.55atm,…

A: We are given gas having the mass of 4.55 gram and  it exerts a pressure of 2.55 atm and occupies a…

Q: Calculate the density of fluorine gas (in g/L) at 35.0∘∘C and 785mmHg.

A: The question is based on the concept of physical chemistry. We have to calculate density of fluorine…

Q: What is the molecular weight of a gas if 2.21 g of the gas occupies a volume of 1.72 L at 25.0 °C…

A: The ideal gas law relates the volume of a gas at a certain pressure to the amount of gas at that…

Q: An underwater research station with a volume of 2.00x107 L needs a delivery of air that completely…

A:

Q: 10.000 grams of zinc metal are placed into a flask containing 100.0 mL of 3.00 M hydrochloric acid.…

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Q: 5.41 A sample of a smokestack emission was collected into a 1.25-L tank at 752 mm Hg and analyzed.…

A: For 100 g sample, Mass of CO2 = 92 g Mass of NO = 3.6 g Mass of SO2 = 1.2 g Mass of water = 4.1 g

Q: Calculate the density of propane gas at 780 torr and 40 0C.

A: Ideal gas law states that the product of volume (L) and pressure (atm) is equal to the product of…

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: A mixture of chromium and zinc weighing 0.363 grams was reacted with excess HCl. After all the metal…

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Q: volume of hydrogen gas

A:

Q: A sample of ideal gas at room temperature occupies a volume of 40.0 L at a pressure of 442 torr . If…

A:

Q: For the following Reaction: 2H2O(g)+Co(s)=CoO2(s) +2H2(g) what volume of H2 at a pressure of 755…

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Q: Concentrated hydrogen peroxide solutions are explosively decomposed by traces of transition metal…

A:

Q: [4] Hydrogen cyanide is prepared by the reaction: 2NH3(g) + 2CH.(g) + 30:(g) → 2HCN(g) + 6H;O(1I)…

A: As temperature and pressure are same for each gas .it can be said that 2 litre NH3 ,2 litre CH4 and…

Q: What is the molar mass of a gas that has density 1.40 g/L at 760. mmHg and 273K?

A:

Q: What is the molar mass of a compound if a gaseous sample has a density of 2.483 g/L at 30 °C and 662…

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Q: Calculate the root-mean-square speeds of CO2 molecules and He atoms at 20 °C.

A: Root mean square speeds of CO2 and He has to be calculated.

Q: 2. There is 1250. cm³ of chlorine gas at 25°C and 90,000 Pascals, what volume will the same gas…

A: Combined gas equation is the combination of Boyle's law, Charles law and Gay lussacs law.

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: Heating potassium chloride KC1O3 yield oxygen gas in potassium chloride what volume in liters of…

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Q: A sample of NaNO3 is partially decomposed by heating, producing O2 gas that is collected safely over…

A: When a gas is collected over water, some water vapors are also present along with the gas. In this…

Q: Zinc reacts with aqueous HCl to produce hydrogen gas (H2) according to the following reaction…

A:

Q: A 0.0733 L balloon contains 0.584 grams of iodine gas, I2, at a pressure of 93.6 kPa. What is the…

A: Given that,  Volume of balloon V = 0.0733 L Weight of iodine gas in balloon w = 0.584 g Pressure of…

Q: What must be the new volume of a sample of nitrogen (in L) if 2.89 L at 742 torr and 23.6 °C is…

A: The final volume of the gas can be measured by using the combined gas law. The combined gas law is:…

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

A:

Q: Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric…

A: In this question, we want to determine the mass of MnO2(s) means how much it is.  How to calculate…

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: Calcium carbonate decomposes due to the effect of temperature producing calcium oxide and carbon…

A: Given: Mass of calcium carbonate i.e CaCO3 decomposing = 3.1 g Volume of cylinder = 1.45 L And…

Q: Given the following reaction:   Mg(s)  +   2 HCl (aq)    ⟶    MgCl2(aq)   +   H2(g)   2.66 g of…

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Q: Ammonium nitrate decomposes explosively upon heating according to the balanced equation:2 NH4NO3(s)…

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Q: how many moles of chlorine gas at 120 degrees Celcius and 33.3 atm would occupy a vessel of 16 l?

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.