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The solution was cooled in an ice-water bath for 10 minutes and pure crystals were obtained. The crystals were filtered on a Hirsch funnel and rinsed with about 0.5 mL of ice-cold ethanol. After dry
If you place a drop of cyclohexane onto a drop of water that is located on a glass surface, what would happen to the hexane and the water
In a hydraulic system a boy of mass m is standing on one of the movable positions that is a disc of radius R, what is the pressure in the hydraulic fluid
A golf ball (mass = 46 g) is struck by a golf club (mass = 210 g). The club head's velocity, how fast is the ball moving after impact
The formula of carbon tetrachloride is CCl4. this means that 1 mole of C combines with 4 moles of Cl to form this compound. How many moles of Cl would be needed to react with 2 moles of C
A sample of a material has 40000 radioactive particles in it today. Your grandfather measured 80000 radioactive particles in it 60 years ago. how many radioactive particles will the sample have
Draw the ideal distillation curve for a 50:50 mixture of two miscible liquids. How do you achieve ideal distillation
What are the magnitudes of forces that act upon links? What is the tension in the rope and one end of the catenary is fixed to the left pole. Massless rope of length l connects second end of the cate
The position of a 250g object is given (in meters) by x=5.0t^3 -8.0t^2 -44t , where t is in seconds. Determine the net rate of work done on this object
A storage tank contains 21.6 kg of nitrogetn (N2) at an absolute pressure of 3.65 atm, What is the volume of the tank
Which of the following reaction sequences can be used to prepare m-chloroaniline starting from benzene
The liquid of density p in a horizontal pipe of diameter d1 before a constriction is at pressure P1 and flowing with the speed v1
Calculate the number of chromium atoms in a 2.0 cm by 1.0 cm by 7.0 cm piece of this stainless steel. Calculate the number of 52Cr atoms in the above sample. The natural abundance of 52Cr is 83.789%
Calculate the mass of a sample of iron (in kilograms) which contains the same number of atoms as 0.8118 L of mercury metal (density of mercury is 13.534 g/cm3).
Given the balanced equation 2 O3(g) --> 3 O2(g) , determine the rate of reaction with respect to [O2]. If the rate of formation of O2 is 6.94*10^-1 M/s, what is the rate of reaction of O3
Rubidium has two stable isotopes, 85Rb and 87Rb. The 87Rb isotope has a natural abundance of 27.83% and an atomic mass of 86.909183 amu. Calculate the percent abundance and atomic mass of the 85Rb i
Determine how many grams of each of the following solutes would be needed to make 3.00 x 10^2of a 0.100 M solution.
A 1.28 g sample of calcium metal reacts with oxygen gas to form 1.79 g of solid calcium oxide as its only product. Using the law of conservation of mass, calculate the mass of oxygen gas which react
You put a kettle on to boil and forget about it so that all the water boils away. what is the change in entropy of the water once it has all turned to steam
Describe, in detail, how you would separate a mixture of ammonium chloride, NaCl, and sand. Will you be using chemical methods. Explain.
A 0.5m^3 adiabatic tank contains steam at 1000 kPa and 350 C, Determine the final steam in the tank and the mass discharged
Calculate the heat in joules when 89.19 g of ice at 100.0 K is turned into liquid water at 10.0 degrees Celsius.
air is contained in a piston/cylinder at 350K, 300kPa and occupies 0.1m^3. determine the change of availability of the system
The observed rotation of a solution of 1.2 g of a compound in 10 mL of water is -6.9 degrees. If the pathlength is 10 cm, what is the specific rotation of the compound
Newton's apple was a sphere with a 5cm radius and density of 850kg/m^3. Its drag coefficient is 0.60 and the density of air is 1.2kg/m^3. Find the apple' terminal velocity