After dissolving an unknown tablet in water, the tablet dissolves and liberates a gas. Suppose at 1 atm pressure and 20 °C, we form 360 mL of gas from a single tablet, and the change in mass of the tablet is 0.64 grams. What is the molecular mass of the gas produced?

Q: 104. A sample of helium gas has been contaminated with argon gas. At 1 atm and 25°C, the density of…

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Q: For the reaction C+O2 =CO2 what volume of O2 gas at 25.0 degrees Celsius and 1.02 atm is required to…

A: Consider the given balanced equation as; C + O2 → CO2     Given information is as follows;…

Q: Two bulbs of different volumes are separated by a valve. The valve between the 2.00 L bulb, in which…

A: Given, two bulbs of different volumes are separated by a valve,volume of gas of bulb 1st V1 =2.00…

Q: A 1.65 g sample of an unknown gas at 45 °C and 1.10 atm is stored in a 1.25 L flask. What is the…

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Q: A 4.00 g sample of a mixture of BaO and CaO is placed in a 1.00 L vessel containing CO2 at a…

A: First we have to calculate the reacted pressure of CO2 gas in the given reaction:-The initial…

Q: potassium chlorate is needed to produce 20.0 mL of oxygen gas at 700. mmHg and 20. °C? 1leent dlaite

A: Volume = 20 mL = 0.020 L Pressure = 700 mm Hg     = 700/760 = 0.921 atm Temperature = 20 °c = 293 K…

Q: The Haber Process synthesizes ammonia at elevated temperatures and pressures. Suppose you combine…

A:

Q: A mixture of xenon and nitrogen gases at a total pressure of 927 mm Hg contains xenon at a partial…

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Q: For the given reaction, what volume of O, would be required to react with 6.4 L of CO, measured at…

A: PV = nRT  When temperature and pressure is constant  V directly proportional to moles…

Q: The density of a sample of gas is 1.00 g/L at 745 mmHg and 109°C. What is the molar mass of the gas

A: The ratio of mass per volume of a given substance is called its density. The equation of state of a…

Q: The complete decomposition of a sample of solid potassium chlorate KClO3 produced 1.34gof solid…

A: The balanced reaction is: 2 KClO3→2 KCl+3 O2 Calculation of mol of KCl produced: No. of mol=given…

Q: At 120 oC, the volume of a sample of nitrogen is 1.07 L. What will the volume be at 205 oC, assuming…

A: Using Charles law of Gas

Q: An organic chemist isolates a colorless liquid from a petroleum sample. She uses the Dumas method…

A: Given- Volume (V) of flask=213 mL Temperature =100.0°C Pressure=754 torr Mass of flask+gas=78.416 g…

Q: A 0.410 L sample of argon is collected at 45 oC. If the temperature of the sample is increased to 75…

A:

Q: A 3.95 g sample of an unknown gas at 69 °C and 1.00 atm is stored in a 1.75 L flask. What is the…

A: The ideal gas equation relates the pressure, volume, temperature, and number of moles of gases of a…

Q: A 0.790 g sample of an unknown substance was vaporized in a 250. mL flask at 77.1 °C and 1.03 atm.…

A: Since the sample is finally in gaseous form. Hence the ideal gas law is applicable. According to…

Q: The Haber Process synthesizes ammonia at elevated temperatures and pressures. Suppose you combine…

A:

Q: The catalytic decomposition of hydrogen peroxide yields oxygen gas and water, according to the…

A: Given:Volume of hydrogen peroxide=75.3 mLTemperature= 25oCPressure=0.976 atmVolume of original…

Q: A piece of magnesium reacts with an aqueous solution of HCl to produce H2 gas. The hydrogen gas is…

A: The ideal gas equation is shown below: PV = nRT Where; P = pressure of the gas V= volume of the gas…

Q: At 600. K how many moles of gas are in a 1.00 L cylinder at atmospheric pressure?

A: The moles of gas is determined by using the ideal gas equation PV = nRT.

Q: The Haber Process synthesizes ammonia at elevated temperatures and pressures. Suppose you combine…

A:

Q: We find that a mass of 0.896 g of a gaseous compound, containing only nitrogen and oxygen, occupy a…

A:

Q: What volume of oxygen gas is produced when 29.4 g of mercury(II) oxide reacts completely according…

A: The given chemical equation is: 2 HgO (s) → 2 Hg (l) + O2 (g) Given mass of HgO = 29.4 g  Molar mass…

Q: A chemistry student places 5.35 grams of aluminum metal into phosphoric acid.  The reaction gives…

A: Given: The mass of aluminium metal taken = 5.35 grams The percent yield = 78.5% We have to calculate…

Q: Ammonia gas has a molar mass of approximately 17 grams per mole. At 290K and 1.2 atm, a sample of…

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Q: The catalytic decomposition of hydrogen peroxide yields oxygen gas and water, according to the…

A: Given,Volume of gas, O2 collected over water, V = 75.3 mL = 0.0753 L   (1 mL = 0.001 L)Temperature,…

Q: How many grams of sodium are needed to produce 2.78 L of hydrogen gas according to the following…

A: Given  Volume of H2 gas = 2.78 Liter  Mass of sodium    =  ?

Q: For the given reaction, what volume of NO₂ can be produced from 0.80 L of O₂, assuming an excess of…

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Q: A sample of gas contains 0.1200 mol of HBr(g) and 6.000x10-2 mol of Cl2(g) and occupies a volume of…

A:

Q: How many grams of sodium are needed to produce 17.7 L of hydrogen gas according to the following…

A: Given data: 17.7 L of hydrogen gas T = 25 °C = 25 + 273 = 298 K P = 1 atm The balanced reaction is…

Q: The Haber Process synthesizes ammonia at elevated temperatures and pressures. Suppose you combine…

A: According to the reaction  N₂ (g) + 3 H₂ (g) → 2 NH₃ (g) we can say the 1 L of N2 will react with 3…

Q: The decomposition of 30.354 g of potassium chlorate yields solid potassium chloride and oxygen gas…

A:

Q: When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced. 2 Al(s) + 6…

A: Given Chemical reaction:

Q: A sample of gas contains 0.2000 mol of CH4(g) and 0.4000 mol of O2(g) and occupies a volume of 24.0…

A: The given reaction is as follows, CH4(g) + 2O2(g) ----> CO2(g) + 2H2O(g) The given information…

Q: If a sample of Argon gas occupies 2.50 L at 100.0 °C and 5.00 atm, what volume will it occupy at 0.0…

A: Ideal gases are those gases which follow ideal gas equation. The relation between pressure, volume,…

Q: The Haber Process synthesizes ammonia at elevated temperatures and pressures. Suppose you combine…

A: Given, Volume of N2 at STP = 1580 LVolume of H2 at STP = 4240 LWe know that, at STP 1 mole of a gas…

Q: A piece of magnesium reacts with an aqueous solution of HCl to produce H2 gas. The hydrogen gas is…

A: Answer: When hydrogen gas is collected over HCl, solution it would also be containing water vapor in…

Q: A sample of gas contains 0.1400 mol of CH4(g) and 0.2800 mol of O2(g) and occupies a volume of 19.6…

A: Gay-Lussac's Law of Gaseous Volume:-When gases react together to form other gases and when all…

Q: A student adds 3.00 g of dry ice (solid CO2) to an empty balloon. What will be the volume of the…

A: Given : Mass of dry ice i.e CO2 = 3.00 g And the condition is STP i.e standard temperature of 273 K…

Q: The partial pressure of oxygen in inhaled air is PO2=159 mmHg and its partial pressure in exhaled…

A: To calculate the rate of oxygen transfer from the atmosphere while breathing, we initially have to…

Q: Given the following reaction: Mg(s) + 2 HCI(aq) MgCl2(aq) + H2(g) 9.49g of magnesium solid is placed…

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Q: A flask of volume 0.753 L contains a sample of chlorine gas, Cl2, with a pressure of 198 Torr at…

A: Volume = 0.753 L  Pressure = 198 torr  Temperature = 25.8 °C  Mass of sodium required to completely…

Q: What do you expect to happen to the  volume of a gas it its temperature is doubled while the…

A: Since you have posted a question with multiple subparts, we will solve the first three subparts for…

Q: The Haber Process synthesizes ammonia at elevated temperatures and pressures. Suppose you combine…

A:

Q: The Haber Process synthesizes ammonia at elevated temperatures and pressures. Suppose you combine…

A: We have to calculate the volume of Reactant left.

Q: 500 mL of a 1.52 mol/L solution of vinegar (acetic acid) is used to react with a 2.53 g sample of…

A: Given the molarity of acetic acid(CH3COOH) in the vinegar solution, C = 1.52 mol/L Volume of acetic…

Q: The label on a cylinder of a noble gas became illegible, so a student allowed some of the gas to…

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

A: Aluminum reacts with dilute hydrochloric acid at room temperature. The metal dissolves in…

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.