The catalytic decomposition of hydrogen peroxide yields oxygen gas and water. In an experiment, decomposition of hydrogen peroxide yielded 75.3 mL of gas collected over water at 25°C and 742 torr. What mass of oxygen gas was collected?

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: Dimethyl ether, CH3OCH3, undergoes gas phase decomposition to form methane, hydrogen gas, and carbon…

A: Solution - Given :- 1) Weight of dimethyl ether= 58.63g 2) Molar mass of dimethyl ether = (2 X…

Q: You placed 6.35 g of a mixture containing unknown amounts of BaO(s) and MgO(s) in a 3.50-L flask…

A: Number of moles of CO2 in the flask initially is calculated using Ideal Gas equation as follows,1…

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

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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: If 34.0 L of a gas is collected at 19 Celcius and 265 kPa, what is its volume at STP?

A: Volume of gas at STP = 83.03 LitreExplanation:Step 1:- Given Temperature(T) = 19 °C Volume( V ) =…

Q: 8.00 gram mixture of copper (II) sulfide and iron (II) sulfide reacted with excess nitric acid and…

A: Given the mass of mixture = 8.00 g composition of mixture is copper (II) sulfide, CuS(s) and iron…

Q: has

A: According to this law, at constant temperature volume is inversely proportional to the pressure…

Q: How many grams of potassium chlorate decompose to potassium chloride and 638 mL of O2 at 128°C and…

A: In a balanced chemical equation, total number of a particular atom on reactant side is equal to the…

Q: If container "A" is occupied by 1.00 mole of oxygen gas while container "B" is occupied by 20.0…

A: No of moles of oxygen gas in container A = 1 mol . So no of atoms in A = 6.022×1023 molecules . No…

Q: The chlorination of methane occurs in a number of steps that results in the formation of…

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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: Hydrogen peroxide was catalytically decomposed and 75.3 mL of oxygen gas was collected over water at…

A: Ideal gas equation is given by,

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: The chlorination of methane occurs in a number of steps that results in the formation of…

A: Given, Volume of CH4 at STP = 257 mL = 0.257 L     (1 mL = 0.001 L) Volume of Cl2 at STP = 599 mL =…

Q: Aluminum, an active metal, reacts with hydrochloric acid in a single displacement reaction.  If I…

A: The reaction taking place between is,

Q: The chlorination of methane occurs in a number of steps that results in the formation of…

A: (a) The total pressure in the flask is to be calculated (b) The partial pressure of CH4 is to be…

Q: A gas weighing 23.6 g occupies a 10.0 L flask at 27.0 °C and 740 torr. Calculate the molar mass of…

A: Mass of a gas = 23.6 g  Volume = 10.0 L  Temperature = 27.0 °C  Pressure = 740 torr  Molar mass of…

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: The density of a gas is 2.436 grams per liter at 27.0°C and 745 torr. Calculate its molar mass.

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Q: The combustion of octane, C,H,18, proceeds according to the reaction shown. 2 C,H,(1) +25 0,(g) 16…

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Q: The reaction below is used to generate hydrogen gas. If 214.4 mL of gas at 731 mmHg is collected…

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Q: Calcium perbromate, Ca(BrO4)2 (m.w.= 327.9 g/mol) decomposes upon heating to release oxygen gas…

A: Given, molar mass of Ca(BrO4)2 is = 327.9 g. Temperature is = 50°C  Total volume is = 438 mL.…

Q: You placed 6.35 g of a mixture containing unknown amounts of BaO(s) and MgO(s) in a 3.50-L flask…

A: The total mass of the mixture = 6.35g Consider the mass of BaO and MgO in the unknown sample be 'x'…

Q: A nitrogen sample occupies 236 mL at STP. If the same sample were collected over water at 25°C and…

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Q: Is the rate of effusion of neon greater or less than the rate of effusion of fluorine gas? How much…

A: Rate of Effusion = When in a per unit time gas passes through area , That rate is termed as rate of…

Q: A 350. mL air sample collected at 35°C has a pressure of 550. torr. What pressure will the air exert…

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Q: You placed 6.35 g of a mixture containing unknown amounts of BaO(s) and MgO(s) in a 3.50-L flask…

A: Given the total mass of BaO and MgO = 6.35 g Let number of moles of BaO = a number of moles of MgO =…

Q: Experimental studies of solid surfaces and the chemicalreactions that occur on them require very low…

A: Converting pressure from torr to atm, we get:  5×10-10760=7×10-13 atm Hence, the pressure in…

Q: The combustion of octane, C8H18, proceeds according to the reaction shown.…

A: The combustion reaction of octane, C8H18 is -   2C8H18(l) + 25O2(g)---> 16CO2(g) + 18H2O(l) From…

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: Three glass bulbs, joined by closed stopcocks, have the following volumes and initial pressures of…

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Q: The rate of effusion of NO2 gas through a porous barrier is observed to be 5.28 x 10 mol/h. Under…

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Q: A balloon contains 159.3 L He at 30.5oC and 791.7 mm Hg. The balloon will burst if its volume…

A: Data

Q: The chlorination of methane occurs in a number of steps that results in the formation of…

A: Given Reaction : 2CH4(g)+3Cl2g)⟶2CH3Cl(g)+2HCl(g)+2Cl-(g)

Q: A nitrogen sample occupies 264 mL at STP. If the same sample were collected over water at 25°C and…

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Q: Chemistry A mixture of methane and neon gases, in a 6.77 L flask at 39 °C, contains 2.02 grams of…

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Q: 238.15L of gas at 841.5 torr and 85.1°C is heated until the temperature reaches 134.1°C.  and the…

A: According to the ideal gas law, the volume of a gas is directly proportional to the number of moles…

Q: Convert the pressure measurement of 251 torr into units of mmHg.

A: The Answer to the following question is- Both torr and mmHg(millimeter of mercury), is unit of…

Q: If 378 mol of octane combusts, what volume of carbon dioxide is produced at 26.0 degrees C and 0.995…

A: Assuming we have excess oxygen.From stoichiometry2 mole octane produces 16 mole CO2Therefore, number…

Q: Consider the following reaction taking place at constant T and V: N2(g) + 3 H2(g) → 2 NH3(g) You…

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Q: The air in a hot-air balloon at 744 torr is heated from 17°C to 60.0°C. Assuming that the moles of…

A: Ideal gas equation PV=nRTP=pressureV=volumeR=gas constantT=temperaturen=mMn=number of molesm=given…

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…

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Q: We have a sample of pure NH3(g) at a pressure of 2.00 atm. The average (or root mean square)…

A: Given data as follows: The pressure of the NH3 = 2.00 atm The root mean square velocity = 836.5 m/s…

Q: We have a sample of pure NH3(g) at a pressure of 2.00 atm. The average (or root mean square)…

A: Given data: pressure , P =2.00 atm root mean square velocity of the NH3(g) =836.5 m/s Density (in…

Q: 9. If 33.6 g of NO and 26.9 g of Oz react together, what is the mass in grams of NO2 that can be…

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Q: Calculate the ratio of the rate of effusion of hydrogen to the rate of effusion of oxygen.

A: According to Graham’s law, if a mixture contains two gases, then the rate of effusion at constant…

Q: You placed 6.35 g of a mixture containing unknown amounts of BaO(s) and MgO(s) in a 3.50-L flask…

A: From given datas  With ideal gas equation we are calculating initial and final number of moles of…

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

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.