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Describe briefly, and then illustrate how the explanation works by finding speed of river's current (in kilometers per anhour), if paddle wheel revolves 40 times per minute.
The engineer is asked to create the water sprinkler which will cover the field of 90 square yards which is in shape of the sector of the circle with radius 10 yards. By what angle must sprinkler rot
When the clock reads 4:00, determine radian measure of the(smaller) angle between hour and minute hand? When the clock reads 5:30, find radian measure of the(smaller) angle between hour hand and minut
Although CaCO3 is considered insoluble, some of it does dissolve in the aqueous solutions. Calculate the molar solubility of CaCO3 in water (where Ksp =8.7 x 10-9).
The words are- Strong acids, ions, reaction, acids, strong electrolyte, hydroxide ions, strong bases, neutralization, weak electrolyte, bases, hydronium ions, weak acids, aqueous solution, dissociat
Follow the error logically through, from effect on standardization curve through the experimental absorbance through final percent composition.
When an aqueous solution which is having the 9.97 g of potassium oxalate, K2C2O4 * H2O is made to react with an aqueous solution having 2.79 g of ferric chloride, FeCl3, some greenish colored cry
Protease X is characterized by the presence of a catalytic triad comprised of the residues: serine, aspirate and histamine. Suppose you have isolated a new Protease X, protease, from a bacterial sou
Two tabs are completely dissolved in enough pure water to give 150.0ml of total solution. This solution is then titrated with a 0.350M solution of HNO3 (aq), HNO3 is the titrant.
Write the balanced equation for the reaction. A sample of hydrogen gas is generated in a closed container by reacting the 2.050g of zinc metal with 16.0 mL of 1.00 M sulfuric acid.
Assume a sample of solid hydrogen is held under an external pressure of 0.030 atm and heated from the 5 to 300K. Discuss what phase changes, if any, will occur?
The incident sunlight at ground level has a power density of 1.2 k W/m2 at noon in July in Los Angeles. A swimming pool of area 50m2 is directly exposed to the sun. Determine the max
An area of the rectangle is product of it length and width, and equals 1062. If lengh is 5 more than 3 times width, determine width of rectangle.
Determine the volumes of each of the following different acid solutions: 1.50 M HCL, 1.50 M HNO3, 1.5 M H2SO4 and describe the masses of NH4Cl, NH4NO3, (NH4)2SO4
Determine the numbers of singly-occupied orbital's are there in the valence shells of the following elements in their ground states according to Hund's rule of maximum spin multiplicity? Enter your
During pH of salt solution lab, discuss why the pH reading you are observing would be affected when the solutions are in contact with the air or when saturated with the air? Include chemical equati
Assume that it cost $100 to manufacture 50 pairs of mittes and $150 to manufacture 150 pairs of mittens. Write the quadratic cost equation. If there is no overhead [that is, if f(0)=0]
Estimate the total number of moles of sodium contained in the 3.6 g of sodium chloride and 5.6 g of sodium sulfate. How can enter the answers in scientific notation of the form 2.1E2?
Calculate the smallest number of ice cubes at 0oC, each containing one mole of water, initially at 20oC to 0oC necessary to cool the 500g of liquid water?
Determine the numbers of possible constitutional isomers can be produced from monochlorination of (S)-3-methylhexane using the Cl2/light?
Suppose you have forgotten to add the boiling tones to your round bottomed distillation flask but the distillation is now in the progress. What should you do?
Determine the numbers of regions of high electron density does bromine pent fluoride have around the central atom? Discuss in details.
What is the molarity of the KOH solution if 175 ml of KOH of unknown concentration with a methyl red indicator present is titrated with the 0.275 M]H3PO4, the yellow solution turns red after
Determine the free pCa in the 100 mL of solution of 0.100 MCa2+ at pH = 10 after adding the 100 mL of 0.100 M EDTA ; Conditional formation constant Kf' = 1.75 X1010 ; pCa = -log [Ca2+].
Assume that instead of linear growth, town experiences quadratic growth in form P=8t2+P0 where t is time in years from 2010.