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When 1.3584g of sodium acetate trihydrate was mixed into the 100.0cm3 of 0.2000 M HCl (aq) at 25 0Cin a solution calorimeter, its temperature fell by 0.3970C on account of the reaction:
Determine the equilibrium constant for the decomposition of phosgene when the chemical formula is given as COCl2 to produce the chlorine gas and carbon monoxide gas.
Determine the equilibrium constant for the given reaction which is carried out at 45 oC. Reaction: The formation of carbon monoxide as from the combustion by using the pure oxygen gas of carbon g
A refrigerator is operated by a 0.25 hp (1 hp= 746 watts) motor. At 2.00oC if the interior is to be maintained and the room temperature is 35oC, determine the maximum heat leak that can be tolerated?
At STP If a 2.15-g sample of a gas occupies 750mL, determine the molar mass of the gas at 125 C? What each number means according to the formula?
At 440 nm the molar absorption coefficient of a solute is 423dm3mol-1cm-1. Determine the concentration of the solution when the light of that wavelength passes through a 6.50 mm cell containing a so
Determine the total energy of the photons detected in one hour if the detector is capturing 3.3×108 photons per second at this wavelength.
10g of ethene were burned in excess oxygen incalorimeter containing 163g of water. the calorimetry constant (heat capacity of the calorimeter) was C= 21.7 kj/ degree C. what was the tempreture rise
A sample which is having 25.0-mL of 0.100 M NH3 (Kb = 1.8 x10-5) is titrated with 0.100 M HCl solution. Determine the pH after the addition of 0.0 mL, 4.0 mL, 12.5 mL, 20.0 mL,24.0mL, 24.5
Describe the atomic mass if a 21.34g sample of a nonreactive metal is placed in a flask containing the 12.00mL of water; the final volume is 13.81mL.
5.0×10-3 molCO2 is introduced into a 1.0 L container and the following reaction comes to equilibrium at 2000°C:
Determine the inexpensive starting material do you think is used to prepare mistily oxide commercially? Summarize the synthesis of mistily oxide from this starting material.
Explain what enthalpy change occurs in the vaporization of 10.0g of methanol when a reference gives value of +39.23 kJ/mol for the molar enthalpy of vaporization for methanol.
Suppose you have 124 g of a mystery substance. It is made up of Hydrogen, oxygen and Carbon. It is burned in excess the oxygen. It produces 28.925 g of H2O and 161.527 g of CO2.
Consider the following hypothetical reactions: A->BΔH=31J, B->C ΔH=64. By using Hess's law to determine the enthalpy change for reaction A->C
Determine the numbers of joules of heat are essential to raise the temperature of a1.20-kg block of iron from the 22 degrees C to 89.5 degrees C. The specific heat of iron is metal is 0.450 J/g*K.
Determine the viewpoint of the chemical reactants of the system, what do you expect for the signs of w and q in this process? The air bags that provide protection in a car accident expand because o
When solutions containing chloride ions and silver ions are mixed, the silver chloride precipitates: Ag+(aq) + Cl-(aq)-> AgCl(s). ΔH=-65.5 Find out the following change of enthalpies.
Determine the volume of concentrated phosphoric acid, H3PO4 (14.8 M) will be required to prepare the 750 mL of 0.25 M phosphoric acid?
Determine the numbers of grams of potassium hydrogen phthalate (KHP) will be needed to titrate the 25 mL of 0.0987 M NaOH solution?
Discuss which process is endothermic? Determine the difference among the heat of condensation of a gas and the heat of sublimation to a solid?
A sample of the gas butane, C4H10 of unknown mass is contained in a vessel of unknown volume, V, a pressure of 560.0 torr and at 24.8 C. To this vessel 8.6787 g of Ne are added in such a way that n
When the electrons return to the ground state they lose the excess energy in the form of 680 nm photons. The laser pointer emits light because electrons in the material are excited from their g
Groups larger than a hydrogen atom are usually in an equatorial position when looking at the most stable conformations of substituted cyclohexanes. Using both structures and words, explain why this
At STP the volume of a sample of gas is 650.0 mL. Discuss what volume will the sample occupy at 950 torr and 0.0 C? Find out which formula to use, what each number is according to the formula, and