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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 temperature of an ideal gas whose molecules encompass an average translational kinetic energy of 6.10 x 10-20 J?
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.
The piston then compresses the air to 0.123 times of the original volume (0.123 Vi) and to 24.9 times the original pressure (24.9 Pi). Determine the latest temperature of the air?
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?
Wheel is connected by the axle to the grindstone of diameter 3ft. Determine angular velocity of the point on rim of grindstone?
The coefficient of linear expansion for copper is 1.6 x 10-5 K-1. Avoid any raise in the size of the faucet itself or of the water heater.
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
A particle of 0.150 kg moves all along an x axis according to x(t) = -13.00 + 2.00t + 5.00t2 - 3.50t3, with x in meters and t in seconds. In unit-vector notation, determine the total force acting on
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
The factor c is a constant. At t = 3.0 s, the force on the particle consists of a magnitude of 36 N and is in the negative direction of the axis. Find out c?
An artifact is discovered at a certain site. If it has 72% of the carbon-14 it originally contained, find approximate age of artifact?
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
Determine the volume of 200 g of mercury vapor at 822 K and 0.500 atm when the Mercury vapor contains the Hg atoms. Show which formula to use, what each number represents, and how you solve it?
Determine the molar solubility of Ag3AsO4, Silver Arsenate in a solution that has a fixed H3O+ (Hydronium ion) concentration of 1.0x10^-9M by systematic method.
i) A certain pipe consists of resonant frequencies of 434 Hz, 558 Hz, and 682 Hz, with no other resonant frequencies among these values. Determine the fundamental frequency of this pipe?
At 440 nm the molar absorption coefficient of a solute is 423dm3mol-1cm-1. When the light of that wavelength passes through a 6.50 mm cell containing a solution of the solute, 48.3 percent of the li
A car of 950 kg hits a huge spring at a speed of 22 m/s, compressing it 5.0 m. Determine the spring constant of the spring and explain how long is the car in contact with the spring before it bounce
Determine the force constant of the bond. The wave number of the fundamental vibrational transition of79Br81Br is 323.2 cm-1.
Determine the frequency and wave number of the J = 2 ← 1transition in the pure rotational spectrum of 12C16O. Does the frequency increase or decrease if centrifugal distortion is considered? The