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The equilibrium constant for the reaction
is 4.2 X 1014. The molar absorptivities for the two principal species in a solution of K2Cr2O2 are
Four solutions were prepared by dissolving 4.00 × 10-4. 3.00 × 10-4. 2.00×10-4 and 1.00 x 10-4 moles of K2Cr2O2 in water and diluting to 1.00 L with a pH 5.60 buffer. Derive theoretical absorbance values (1.00-cm cells) for each solution and plot the data for
(a) 345 nm,
(b) 370 nm. and
(c) 400 nm.
Water flows at the rate of .5kg/s in a 2.5cm diameter tube having a length of 3m. A constant heat flux is imposed at the tube wall so that the tube wall temperature is 40 degrees C higher than the water temperature. Calculate the heat transfer and es..
It is claimed that a refrigerator requiring 400 W of power (W) receives heat from cold storage (low temperature source, TL) at 200 K and rejects heat at the rate of 600 W (QH) to an environment at 600 K (high temperature reservoir, TH). Calculate the..
a ship has an engine that rotates clockwise when viewed from the front. it has an effective moment of inertia of 250 kg
the populatoin p of a small community on the outskirts of a city grows rapidly over a 20-year periodt 0 5 10 15 20p 100
consider a steam power plant that operates on a simple ideal rankine cycle and has a net power output of 45mw. steam
As shown, a 150 lb bungee jumper wants to jump from the top of a 630 ft high bridge and be able to just touch the water below. Given that the bungee cord has a spring constant of 108 lb/ft, what should the bungee cord's relaxed length, l, be for t..
Water at 30 degrees C flows through a horizontal pipe (1 inch inside diameter), in which the pressure drop is to be limited to 0.015 lbf/ft^2 per foot of length. This low pressure per foot is imposed by the excessively long line involved. Calculate t..
when drilling a hole in a table leg a furniture maker uses a hand-operated drill with a bit of diameter d4.0mm.a. if
a natural gas-fired furnance in textile plant is used to provide steam at 130c at time of high demand the furnace
a heat exchanger at an industrial plant uses river water to condense 2x105 kgh of steam from saturated vapor to
A vertical trapezoidal gate that is used as an automatic valve is held shut by two springs attached to hinges located along edge AB. Knowing that each spring exerts a couple of magnitude 1470 N ? m, determine the depth d of water for which the gat..
a mass of gas at an initial pressure of 28 bar and with an internal energy of 1500 kj is contained in a well-insulated
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