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A sample of water is to be analyzed for solids content. Ten liters (10.0 L) of water are passed through a filter initially weighing 15.0 g. After drying at 105 oC, the filter plus residual weighs 43.0 g. The filter is heated to 550 oC, and the filter plus residual then weighs 37.0 g. Another 10.0 L sample of the same water is evaporated, without filtering, yielding a residual mass of 40.0 g. This residual is heated to 550 oC and the remaining mass is reduced to 25.0 g. What are the values for TS and TDS for this water?
Each single phase transformer has an identical number of turns in the primary and secondary windings. If a line-to-line voltage of 480V is applied on the wye windings, compute the line-to-line voltage on the delta windings.
Using the Canadian National Pollutant Release Inventory (through the Environment Canada Website) choose any 3 chemicals and determine their quantities released to the air, water and land.
A balloon filled with H2 (g) at 0.0 °C and 1.00 atm has a volume of 2.24 L. What is the final gas volume if 0.10 mol He (g) is added to the balloon and the temperature is then raised to 100 ° C while the pressure and amount of gas are held constan..
List the five dimensions of the general environment and give an example of a force within each dimension that would affect a local car dealership.
A certain light source is found to emit radiation whose peak value has a frequency of 1.21×1015 Hz. Calculate the temperature of the source
Find the maximum torque on an orbiting charged particle if the charge is 1.60E-19C, the circular path has a radius of 0.5E-10m, the angular velocity is 4E16 RAD/S, and B=0.4E-3T.
What about the thoughts process around managers manage things and lead people. What are your thoughts on how this could be built upon to define the differences between managing and leading?
We look at the design, screen, camera and software features of the two best smartphones of 2013, the HTC one and Samsung Galaxy S4, to help you decide which to buy.
Where latitude the only control of temperature, the isotherms would run straight accross the maps from east to west. Part 1) Describe one region of the world where this hypothetical pattern is actually observed. Part 2) Why is the hypothetical isothe..
Express the diode current equation. A) Define all the diode parameters and draw the I-V characteristics. (Assume non-ideal diode) B) If IF=10 mA, Is=10-15A, VT=25mV, Calculate the voltage drop across the diode.
Which of the following would be expected to have the highest pH?
what would the rate constant be at a temperature of 150C for the same reaction described in Part A?
It is heated so that its pressure increases from 1.50 atm to 407 atm. Determine the work done on the gas during this process.
Determine whether sodium monohydrogen phosphate (Na2HPO4) is neutral, basic, or acidic. First, what is its Ka when it acts as an acid? Second, what is its Kb when it acts as a base?
Calculate the pH at the following points a. Before Titration b. After the addition of 5.00mL of NaOH c. After the addition of 25.00mL of NaOH d. After the addition of 50.00mL of NaOH e. After the addition of 5.00mL of NaOH
Find the pH of the resulting solution when 20.00mL of a 0.1000M triethylamine (CH3CH2)3N (Kb = 5.2x10-4) solution is titrated with 20.05mL of a 0.1000M HCl solution.
here A solution of a primary standard KHC8H4O4 was prepared by dissolving 0.4877g potassium hydrogen pthalate in 50 ml H2O. Titration with KOH required 23.84 ml to reach a phenopthalein end point . What is the molarity of KOH
Lewis Structure for a Nitrate Ion (NO3-1). Assign the formal charge for the central atom, Nitrogen. What is that formal charge
How many grams of Na3PO4 will be needed to produce 400ml of a solution that has a concentration of Na+ ions of 0.900 ?
Formic acid, HFor, has a Ka value equal to about 1.8x10-4. A student is asked to prepare a buffer having a pH of 3.40 from a .10M HFor and a .10M NaFor solution. How many milliliters of the NaFor solution should she add to 20mL of the .10M HFor to..
For a particular reaction, deltaH is -93.8kJ and deltaS is -156.1 J/K. Assuming these values change very little with temperature, over what temperature range is the reaction spontaneous in the forward direction?
Determine the molecular formula of a compound which has a empirical formula of CH3 and a molar mass of 60.0 g/mol.
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