Calcium hydride, CaH2, reacts with water to form hydrogen gas: CaH2 (s) + 2H2O (l) → Ca(OH)2 (aq)  +  2H2 (g) How many grams of CaH2 are needed to generate 10.0 L of H2 gas if the pressure of H2 is 740 torr at 23oC?

Q: A sample of sodium chlorate, NaClO3 (molar mass = 106.44 g/mol), is completely decomposed according…

A: Given data : Volume of O2 = 483 mL = 0.483 L Pressure of O2 = 736 torr = 0.968 atm Temperature  =…

Q: How many liters of hydrogen gas would be produced by the reaction of 38.6 g of Al with excess HCl at…

A: The given balanced chemical reaction is as follows: As per the information  mass of aluminium is…

Q: When chromium metal is added to nitric acid, the following reaction takes place Cr (s) + 6 HNO₃ (aq)…

A: Cr(s) + 6HNO3(aq) ....> Cr(NO3)3(aq) + 3H2O(l) + 3NO2(g) T = 40°C = 40°C+273 = 313K Mass of Cr =…

Q: Gaseous ammonia is synthesized from nitrogen and hydrogen by the reaction…

A: N2 +3H2 →2NH3  According to ideal gas equation   PV =nRT 542760×355 =n ×0.0821 ×298n=10.3479 moles

Q: Chlorofluorocarbons (CFC's) are gases that were formerly widely used in aerosols and refrigerators…

A: Given: Mass of CFC = 2.50 g. Temperature = 22 oC Pressure = 1.02 atm. And volume of flask = 500 mL =…

Q: alcium hydride (CaH 2) reacts with water to form hydrogen gas:   CaH 2 (s) + 2H 2O (l) → Ca(OH) 2…

A: Given, Volume of H2 = 48.0 liter pressure of H2= 0.888 atm temperature of H2= 32°C = 32 +273 = 305K…

Q: What is the volume in liters of hydrogen gas that would be produced by the reaction of 55.2 g of Al…

A:

Q: Use the References to access important values if needed for this question. Sodium metal reacts with…

A: The pressure of the wet hydrogen gas is the sum of the pressure of the dry hydrogen gas and the…

Q: When 101 g of KOH is added to a 3.9 L container of O3 at 25°C and a pressure of 66 atm, the…

A: The given reaction is: 5O3(g) + 2KOH(s) → 2KO3(s) + 5O2(g) + H2O(g) Determination of initial mol of…

Q: Calcium carbonate decomposes to form calcium oxide, and carbon dioxide when heated as shown in the…

A:

Q: Suppose 2.80% of 480 g of PCls (208.2 g/mol) initially present in a 7.00 L reaction vessel at 300°C…

A:

Q: Carbon monoxide gas reacts with hydrogen gas to form methanol via the following reaction:…

A:

Q: An impure sample contains Al and an unreactive material. A sample weighing 5.00 g is analyzed by its…

A: Given data: The mass of sample analyzed = 5.00 g. The volume of H2 gas collected V = 4.16 L.…

Q: How many liters of H. gas would be produced by the complete reaction of 2.93 g of Al solid at STP…

A:

Q: The gas of a certain volcano had the following composition in mole percent: 60.0% CO2, 28.0% H2,…

A: To calculate partial pressure of CO2:

Q: The following reaction is used to generate hydrogen gas in the laboratory. If 243 mL of gas is…

A: First determine the moles of hydrogen produced from given reaction under given conditions.…

Q: Oxygen gas can be prepared by heating potassium chlorate according to the following equation…

A: The number of moles of oxygen is calculated as,

Q: Urea ((NH2)2CO(s)) was the first organic compound to be synthesized in a laboratory. Today it is…

A: The objective of the question is to find out the volume of CO2(g) required to react with 10 L of…

Q: What is the mass in grams of Al that were reacted with excess HCl if 2.02 L of hydrogen gas were…

A:

Q: What volume in liters of H₂ gas would be produced by the complete reaction of 2.93 g of Al solid at…

A: The number of moles of solid Al reacted =

Q: What volume of fluorine gas is produced when 0.412 mol of bromine trifluoride reacts completely…

A: Suppose a balanced chemical equation  aA +bB –> cC Then, a mol of A produces c mol of C #ideal…

Q: 37. What volume of H, gas, measured at 27°C and 700. torr, can be obtained by reacting 5.00 g of…

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Q: A mixture of solid calcium oxide,  CaO,   and solid barium oxide,  BaO,   weighing  3.145 g   is…

A:

Q: A mass of 8.92 g carbon monoxide is reacted with 7.18 g hydrogen to form methanol.   CO(g) + 2 H2(g)…

A:

Q: What is the volume in liters of hydrogen gas that would be produced by the reaction of 51.2 g of Al…

A: Given 2 Al(s)  + 6 HCl(aq)   →   2 AlCl₃(aq) + 3 H₂ (g) 2×27g of Al→ 6g of hydrogen 54g of Al → 6g…

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

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Q: The gas of a certain volcano had the following composition in mole percent: 60.0% CO2, 28.0% H2,…

A:

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

A: The balanced chemical equation for the reaction is given as 2 Al(s) + 6 HCl(aq) -> 2 AlCl3 (aq) +…

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.