Why is it not necessary to add more rhodium and platinum to a catalytic converter as these substances are used? What is the role of carbon dioxide in air in Fresco Painting? What type of catalytic mechanism exist in Fresco painting? Why? What type of catalytic mechanism is involved in Haber’s or Bosch process in producing ammonia? Explain why? Why activation energy is important to start a chemical reaction? What is the relationship between catalyst and activation energy? How do you call the catalyst that slows down chemical reaction?

Q: Hydrofluoric acid, HF, has a Ka of 6.8 x 10-4. What are [H3O+], [F-], and [OH-] in 0.75 M HF?

A: An acid dissociation constant (Ka) is a quantitative measure of the strength of an acid in solution....

Q: . In a continuous distillation column as the reflux ratio is increased, the overhead product purity ...

A: Increasing reflux ratio increases load on reboiler and decreases feed flow rate.

Q: 1g of water at 373 K is converted into steam at the same temperature. Thevolume of water becomes 167...

A: Given, Heat of vaporization, L=540 cal/g Mass of water, m=1 g Temperature, T=373 K Volume of water=1...

Q: - A rigid tank which acts as a perfect heat insulator and which has a negligible heat capacity is di...

A:

Q: The reaction of 1 mol of solid phosphorus with chlorine gas to form PCl3(g) releases 287 KJ of heat ...

A: This law is dependent on Hess's law. Data given : Reaction of 1 mol of solid phosphorus with chlorin...

Q: i need the answer quickly

A: Note We’ll answer the first question since the exact one wasn’t specified. Please submit a new quest...

Q: An insulated cylindrical storage tank of 80 m3volume initially contains 75 m3ofnonvolatile liquid an...

A: Volume of tank = 80 m³  Non volatile liquid volume V1 = 75 m³  Air volume V2 = 5 m³  Initial pressur...

Q: In SPME for HPLC, analytes are desorbed from thefiber into solvent that is injected into the HPLC co...

A: SPME also known as Solid Phase Micro Extraction is an equilibrium sampling method and can be used fo...

Q: DETERMINATION OF pH OF DIFFERENT SOLUTIONS show complete solution For those who will be using scient...

A: (a)

Q: Nitric acid, HNO3, can be manufactured fromammonia, NH3, by using the three reactions shownbelow.Ste...

A: Moles of NH3=4 moles To Calculate the amount of HNO3 that can be produced.

Q: A concentration process increases the solid content of 300 kg of fresh tomato juice from 13.5% to 59...

A: In mass transfer, the drying process is the type of mass transfer process consisting of removing wat...

Q: In a study of the thermal decomposition of lithium peroxide,     a chemist finds that, as long as so...

A: Lithium peroxide is used in space technology because it absorbs carbon dioxide and liberates oxygen....

Q: When NaHCO3 is exposed to heat it decomposes to solid sodium carbonate Na2CO3(s), liquid water and c...

A: Let, NaHCO3 = A Na2CO3 = B H2O = C CO2 = D Mass of NaHCO3 heated, mA = 17.2 g Molar mass of Na, MWNa...

Q: Can you please help me with number 4.

A:

Q: 3. Steam flowing at a mass ow rate of 3 kg/s enters pipe A at 200 kPa and 700 °C. Water flowing at a...

A: Mass Flowrate of Pipe A = 3 Kg/s Pressure = 200 kPa Temperature = 700 C Mass Flowrate of Pipe B = 4 ...

Q: B/ A 0.9257gm sample of impure magnesite, MgC03, was decomposed with HCI. The liberated CO2 was coll...

A:

Q: How to speed? At distance 2m and time is 2 sec

A: The speed for the given data is to be calculated.

Q: 3. Discuss the applications of DCS and PLC in Petrochemical industries of Oman

A: The petrochemical industry is an industry branch that produces organic intermediate products such as...

Q: Can you help me with this question?

A: Dear Subscriber! As per our policy, we have solved the first three subparts. We suggest you repost t...

Q: Two of the colligative properties are elevation of boiling point and the depression of freezing poin...

A: Thermodynamic reasons behind these properties are: The boiling point of a solution that contains a n...

Q: 258. mg of an unknown protein are dissolved in enough solvent to make 5.00 mL of solution. The osmot...

A: The molar mass of the protein is to be calculated.

Q: A cylinder contains 1.2 moles of ideal gas, initially at a temperature of 117°C. The cylinder is pro...

A: The number of moles of gas(n)=1.2moles Initial Temperature(T1)=117oC=390K Final Temperature(T2)=27oC...

Q: 3- A sheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200 °C and is permitted ...

A:

Q: 270 kW of power is required to crush 150 tonnes/h of a material. It 80 % of the feed passes through ...

A: P = 270 KW m = 150 ton/hr Dpa= 50 mm (screen) Dpb= 3 mm  

Q: Answer the Questions below True or False: Less energy is required for regeneration in adsorption tha...

A: It is to be stated whether the regeneration step requires less energy in adsorption than absorption ...

Q: What happens if the discharge electrode is negative in electrostatistic precipitation?

A: Electrostatic precipitator is a filtering device  that removes dust, smoke and ash using the princip...

Q: A system consisting of a tank and a pipline is shown in the figure below. The water is at 82.2 ℃ and...

A: The temperature of the water, T = 82.2°C The flowrate of water, Q = 400 L/min The schematic diagram ...

Q: Actual = number on product side of balanced equation ** Theoretical = answer to your stoichiometry p...

A:

Q: For multi-component systems, Underwood Equations gives OL Minimum Trays O II Minimum Strip O II Mini...

A: Distillation is a separation process in which light hydrocarbon is separated from heavy hydrocarbon ...

Q: Show solution

A: The aqueous ionic solutions are prepared by dissolving the given compound in water. In water, the co...

Q: A carburated internal combustion engine is converted to run on methane gas (i.e., natural gas CH₄)....

A: Air-fuel(Methane) ratio=40:2 To Calculate moles of oxygen per mole of methane.

Q: Draw the total vapour pressure Vs. mol fraction diagram for a binary solution exhibiting non-ideal b...

A: According to Raoult’s law for a solution containing volatile liquids that behave ideally, the partia...

Q: Part B: A sample of gas in a cylinder as in the example in Part A has an initial volume of 58.0 L , ...

A: Given data: Initial volume of gas = 58 L Initial number of moles of gas = 1.4 mol Final volume of th...

Q: A human brain weighs about 1 kg and contains about 1011 cells. Assuming that each cell is completely...

A: here, the weight of each of the brain cell = total weight of the human brain/the number of cells Let...

Q: e. 125I 25I+ ? 53 53 Balanced equation: ОА. а-decay в В-decay C. Fission OD. Fusion E. Other

A:

Q: SnO2(s)  +  2 CO(g)  ⇌  Sn(s) + 2 CO2(g) The equilibrium constant for this reaction at 500oC is 0.02...

A: Kp =0.025 at 500oC SnO2(s)  +  2 CO(g)  ⇌  Sn(s) + 2 CO2(g)

Q: snip

A:

Q: A sample of dry ice (solid CO2) is cooled to 173 K (-100.0 oC), and is set on a table at room temper...

A: Given, Temperature to which dry ice is cooled=173 K Room temperature=298 K Pressure=1 atm

Q: Question 3/4 please

A: Note: Since we are entitled to answer only 1 question, we’ll answer the first one of the mentioned q...

Q: Express the rate of reaction in terms of the change in concentration of each of the reactants and pr...

A:   The reaction rate or rate of reaction is the speed at which a chemical reaction takes place, defin...

Q: i need the answer quickly

A: Power = 20.8kW Heat delivered = 58.33 kJ/s  

Q: Determine the heat of reaction (J/mol) burner gas if the gas stream from a sulfur burner consisting ...

A: Reaction is oxidation of SO2 to SO3.

Q: i need the answer quickly

A:

Q: An air compressor, as shown in the figure, compresses air from atmospheric pressure (100 kPa) and te...

A: P(1) = 100 kPa T(1) = 280K P(2) = 600 kPa T(2) = 400K Mass Flowrate = 1 kg/s  

Q: .Water at 40°C is stored in an open tank at atmospheric pressure. The pump is 3.0 m below the open t...

A:

Q: How many moles of argon gas are contained in 2.4 L at 0°C and 1.0 atm. a. 0.1 mol b. 9.33 mol ...

A: Volume= 2.4 L Temperature = 0°C = 273 K Pressure = 1.0 atm

Q: how we solved this problem? Plz

A: Given: Specific gravity of benzene = 0.876 Therefore, density of benzene = 876 kg/m3 Specific gravit...

Q: What is the percent yield if you combine 97.5g of NO and 88.0g of O2 and create 2.68 moles of NO2? 2...

A: Percent yield is the percent ratio of actual yield to the theoretical yield. It is calculated to be ...

Q: 25 + 302--> 2sO3 What mass of sulfur trioxide would be produced is 13.0 g of oxygen reacted complete...

A: Formation reaction of SO3. Mass of Oxygen=13g  

Q: I need help with number 1

A: Keq = 14 moles of H₂ = 0.60 mol moles of S = 1.4 mol Volume of flask = 2.0 L We have to find [H₂] = ...

Reaction Kinetics

For a chemical reaction, the part of chemistry dealing with the speed as well as the rate of reaction is known as reaction kinetics. Reaction kinetics is also known as chemical kinetics