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An unknown sample solution whose concentration is 1:55 103 g=L is placed in a 1cm clear holder and found to have a transmittance of 44%. The concentration of this sample is changed such that its transmittance has increased to 57%. Calculate the new concentration of the sample.
question 1what are the two main types of industrial ventilation which are used to control airborne contaminants in a
Compute the worst voltage regulation and the power factor at which it occurs, when the transformer is delivering rated output at rated secondary terminal voltage of 240 V. Sketch the corresponding phasor diagram.
Obtain the Thévenin and Norton equivalent circuits for the portion of the circuit to the left of terminals a-b in Figure P2.1.4, and find the current in the 200-Ω resistance.
What is the mass of the water in the container, assuming that all the heat lost by the copper is gained by the water?
An electronics plant uses an adsorption system to recover solvent from a vent gas stream and prevent volatile organic compound (VOC) emissions. The vent gas flow rate is 20 m3 /s of dry air at 293 K, 1.5 atm.
200 kJ of heat is added under constant pressure to 1 kg of steam initially at 30 bar, 400 °C. What is the final temperature? What is the change in internal energy during this process?
The typical vent-gas analysis from the recycle stream in an oxyhydrochlorination process for the production of dichloromethane (DCE) (British patent BP 1,524,449) is given below, percentages on volume basis.
A process modification has been devised that will increase the yield to 75%. The additional investment required is $1,250,000, and the additional operating costs are negligible. Is the modification worth making?
Finding the Heat of Reaction (Enthalpy) from Heats of Formation, Calculate the heat of reaction at the standard reference state for the following reactions
What is element X? Propose a name for H2X? To completely neutralize a sample of H2X, 35.6 mL of 0.175 M OH solution was required. What was the mass of the H2X sample used?
a. What alarms would you add to the vaporizer control scheme shown in Figure? Indicate whether the alarm would signal high or low conditions, what the alarm would signify, and what operator response would be required in each case.
Of the three basic types of radioaction-alpha, beta, and gamma-which has the greatest penetration into tissue? Explain the rationale behind your answer.
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