CaH2(s) + 2 H2O(l)  Ca(OH)2(aq) + 2 H2(g) This reaction is sometimes used to inflate life rafts, weather balloons, and the like, where a simple, compact means of generating H2 is desired. How many grams of CaH2 are needed to generate 17.0 L of H2 gas if the pressure of H2 is 750. torr at 16°C?

Q: When gaseous F₂ and solid I₂ are heated to high tempera-tures, the I₂ sublimes and gaseous iodine…

A: Given   The pressure of fluorine gas is 350 torr. The mass of solid iodine is 2.50 g. The volume of…

Q: When copper metal is added to nitric acid, the following reaction takes place Cu (s) + 4 HNO₃ (aq) →…

A: Answer: 6.14 liters

Q: A 10.0 liter stainless steel container was charged with 4.00 atm of hydrogen and 3.00 atm of oxygen…

A: Given that : Pressure of hydrogen gas = 4.00 atm Pressure of oxygen gas = 3.00 atm The volume of the…

Q: Zn (s) + H2SO4 (aq) --> H2 (g) + ZnSO4 (aq) You run a reaction and collect 166.3 mL of hydrogen gas…

A: Hydrogen gas Volume = V = 166.3 mL = 0.1663 L Pressure = P = 740.3 torr = 0.974 atm Temperature = T…

Q: 1) A student is preforming the baking soda (NaHCO3) with vinegar (CH COOH) volcano experiment. If…

A: For STP. P = 1 atmT = 273 KV = 5.00 Lmolar mass of NaHCO3 = 84.01 g/molR = 0.08206 Latm/molK

Q: 10.0 L stainless steel container was charged with 4.00 atm of hydrogen and 3.00 atm of oxygen gas. A…

A: To determine the pressure in the tank at 22oC.

Q: 100.0 mL flask contains 0.193 g of a volatile oxide of nitrogen.  The pressure in the flask is 760.…

A: We have to predict the molar mass of gas and gas also.

Q: Potassium permanganate, KMnO4, decomposes to yield oxygen gas, O2, according to the balanced…

A: in Balanced chemical equation equal number of atoms are present in reactent and products side.

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

A: The objective of the question is to calculate the total pressure in the flask and the partial…

Q: 10. LiOH is used to condition air in spacecraft by absorbing the carbon dioxide exhaled by…

A: According to the balanced equation, 2 moles LiOH can absorb 1 mole CO2.  We can convert the mass of…

Q: Given the following chemical reaction: Al + HCl ---> AlCl3 + H2(g) If you measured the partial…

A: Temperature = 45 0CPartial volume of hydrogen gas = 728 mLTotal pressure = 845 torrConcentration of…

Q: The following combustion reaction is done with 0.225 g of ethylene, C2H4. C2H4 (g)  + 3 O2 (g)  → 2…

A: Number of moles of ethene and carbondioxide can be calculated as follows:

Q: Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right).…

A:

Q: The combustion of octane, C8H18 , proceeds according to the reaction shown. 2C8H18(I) + 25 O2…

A: The number of moles of carbon dioxide, produced in the reaction, is calculated as shown below where…

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

A: Answer: In this question we will use ideal gas equation to calculate partial pressure of gas which…

Q: When copper metal is added to nitric acid, the following reaction takes place Cu (s) + 4 HNO₃ (aq)…

A:

Q: An environmental engineer analyzes a sample of air contaminated with sulfur dioxide. To a 500.-mL…

A: Answer: By the use of stoichiometry, we will calculate the number of moles of SO2 and then by the…

Q: A sample of zinc metal is allowed to react completely with an excess of hydrochloric acid: Zn(s) + 2…

A: Zn (s) + HCl (aq) ==> ZnCl2 (aq) + H2 (g)  Volume given = 8.70 L  Temperature = 25°C = 298 K

Q: When copper metal is added to nitric acid, the following reaction takes place Cu (s) + 4 HNO, (aq) →…

A:

Q: A gas cylinder contains 1.40 mol He,1.40 mol He, 1.10 mol Ne,1.10 mol Ne, and 2.10 mol Ar.2.10 mol…

A: The gas cylinder contains helium, neon and argon.

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

A:

Q: When copper metal is added to nitric acid, the following reaction takes place Cu (s) + 4 HNO₃ (aq) →…

A:

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: The combustion of propane occurs when propane interacts with oxygen gas to produce water and carbon…

A: The given combustion reaction of propane is , C3H8(g)+ 5O2(g)---> 3 CO2(g)+ 4H2O(g) Here we see…

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: In a collision of sufficient force, automobile air bags respond by electrically triggering the…

A: Given data contains, Mass of sodium azide is 50.0-g. Temperature is 26°C=299.15 K. Total pressure is…

Q: When copper metal is added to nitric acid, the following reaction takes place Cu (s) + 4 HNO3 (aq) →…

A:

Q: 2 Co (s) + O2 (g) --> 2 CoO (s) If 8.18 grams of solid cobalt react in a 3.21 L vessel at -34.80 oC…

A:

Q: When 15.0 g of fluorite (CaF2) reacts with excess sulfuric acid, hydrogen fluoride gas is collected…

A: . The reaction is as follows CaF2(s) +H2SO4(excess) →2HF(g) +CaSO4(s) Moles of calcium fluorite…

Q: 16.0 g of KO2 was reacted with CO2 in a 3.00-L tank according to the reaction below. 4 KO2 (s) + 2…

A: Here we have to apply mole concept.

Q: Sulfur trioxide, SO3, is produced in enormous quantities each year for use in the synthesis of…

A: Given: 1) Temperature =340°C =(340+273)K 2) Pressure = 6.75 atm 3) Mass of sulfur = 5.70 g 4)…

Q: Partial Pressure 2, 1. A chemist runs a reaction that generates O₂ N₂ and H₂, in a 1.57 L vessel at…

A: To determine if the vessel explodes or not, we have to calculate the total pressure

Q: A 100.0 mL flask contains 0.126 g of a volatile oxide of nitrogen. The pressure in the flask is 760…

A: Given: Volume(V)=100mL=0.1LWeight(w)=0.126gPressure(P)=760torrTemperature(T)=17oC=290.15KM=molar…

Q: on reacts with hydrochloric acid to produce iron (II) chloride and hydrogen gas:   Fe(s) + HCl(aq)…

A:

Q: Consider the following reaction: NaClO3(s)+ Fe(s)→ O2(g)+ NaCl(s)+FeO(s)   What volume of O2 gas…

A: Given data: The mass of NaClO3 = 2.10 kg = 2100 g. Pressure = 3.00 atm. Temperature = 391 K.…

Q: None

A:

Q: The combustion of octane, Cg H18, proceeds according to the reaction shown. 2 C8H₁8 (1) + 25 O₂(g) →…

A: An ideal gas follows a theoretical concept in which there is no interparticle interaction between…

Q: When gaseous F2 and solid I2 are heated to high temperatures, the I2 sublimes and gaseous iodine…

A: Given   The pressure of fluorine gas is 350 torr. The mass of solid iodine is 2.50 g. The volume of…

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: Automobile air bags inflate during a crash or sudden stop by the rapid generation of nitrogen gas…

A:

Q: Automobile air bags inflate during a crash or sudden stop by the rapid generation of nitrogen gas…

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

A:

Q: When copper metal is added to nitric acid, the following reaction takes place Cu (s) + 4 HNO₃ (aq) →…

A:

Q: If a gaseous mixture is made by combining 1.29 g Ar and 2.46 g Kr in an evacuated 2.50 L container…

A: The total pressure of a mixture of two non reacting gases is given by  PtotalV = (n1+n2)RT  Ptotal =…

Q: A sample of unknown metal (X) of mass 0.116-g reacts with hydrochloric acid to produce 77.5mL of…

A: Given: mass of metal = 0.116 g Temperature = 20 °C pressure of wet gas = 754 mmHg vapor pressure of…

Q: When copper metal is added to nitric acid, the following reaction takes place Cu (s) + 4 HNO₃ (aq) →…

A: Given, Temperature (T) = 25.0°C = 25.0 + 273 = 298K Mass of Copper = 2.65 g Total Pressure = 726…

Q: Consider the following reaction in a closed reaction flask. If 8.36 atm of gas A is allowed to react…

A: Since pressure is directly proportional to the number of moles, thus we can calculate the pressures…

Q: Acetylene, C2H2, is produced in the laboratory when calcium carbide, CaC2 reactswith water according…

A: The given reaction is : CaC2 + 2H2O -----------------> C2H2 +Ca(OH)2 The total pressure is the…

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.