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Describe what would happend if a hot saturateed solution was filtered by vaccum filtration using Buchner funner at room temperatue.
What average force does the bullet exert on the target?(N)
Suppose you dissolve 50 mg of ascorbic acid (M=176.124g/mol) in water in a 100 mL volmetric flask. then you remove a 10.0 mLa liquot of the solution, put into a beaker, and add 20 mL water and10 mL
Decomposition of dinitrogen pentoxide to nitrogen dioxide and oxygen follows 1st order kinetics and has an activation energy of102 kJ/mol.
A flame test on NaCl produces an intense orange-yellow color. A sodium vapor street lamp (using elemental sodium) produces the same color.
If you suspect a chemical used in the lab might be carcinogenic, what definitive written source of info is availible in the lab to look it up?
Based on the structures of Aspirin and Acetaminophen, why might aspirin be more likely to cause an upset stomach?
A proton is fired from far away toward, the nucleus of a mercury atom. Mercury is element no. 80. If the initial velocity of the proton is 4x107m/s, what is the distance of closet approach to the nu
6.32 g of potassium chlortae reacts according to the following equation : 2 KClO3 -> a KCl + 3 O2 Determine the quantity of oxygen produced by the reaction as amass and as a volume at a 105 kPa a
Protons in a linear accelerator are accelerated through a potential difference of 400,000 volts. What is the velocity of the protons after being accelerated?
A uniform magnetic field of magnitude 0.30 T is directed perpendicular to the plane of a rectangular loop having dimensions 8.2 cm by 15 cm. Find the magnetic flux through the loop.
The reactivities of phenol and aniline toward bromination change when the reaction is performed in sulfuric acid rather than aceticacid. Explain why?
A 0.10kg dart is fired horizontally at the center of a 0.80kg vertically hanging block, sticking to it. The system reaches a maximum height, h, of 0.20m above the collision point. Find: a) the velo
Write an equation for the Aldol reaction that takes place for the aldehyde. Show the exact structures for aldehyde and product (not general structures with "r" groups)
Calculate the solubility of zinc hydroxide, Zn(OH)2, in 1.00 MNaOH. Ksp = 3.0 x 10^-16 for Zn(OH)2, Kf = 3.0 x 10^15 for Zn(OH)42-
A current of 250. A flows for 24.0 hours at an anode where the reaction occuring is What mass of MnO2 is deposited at this anode?
Water drips from the nozzle of a shower onto the floor 210 cm below. The drops fall at regular (equal) intervals of time, the first drop striking the floor at the instant the fourth drop begins to f
A 20 x 10-9 C charge is at the origin, and a -10 x 10-9 C is at x=15 cm. At what point or points on the x-axis is the electric potential zero?
1.63 g of precipitate is collected from a reaction of a silver nitrate solution with 10.0 mL of hydrochloric acid. Calculate the concentration of a hydrochloric acid solution.
The current in a 100 watt lightbulb is 0.900 A. The filament inside the bulb is 0.300 mm in diameter. What is the electron current in the filament?
A uniform magnetic field is turned on perpendicular to the plane of the coil. If the field changes linearly from 0 to 0.455Wb/m^2 in a time of 1.06s find the magnitude of the induced emf in the coil
A wire has resistance R. A second wire has twice the length, twice the diameter, and twice the resistivity of the first wire. What is its resistance?
A hydrogen bond between two water molecules is approximately 1/20as strong as a covalent bond between oxygen and hydrogen.
The electric field everywhere on the surface of a charged sphere of radius 0.290 m has a magnitude of 600 N/C and points radially outward from the center of the sphere. What is the net charge on the
If a sample containing 0.1mg/L of nitrite-nitrogen gives 85 percent transmission when submitted to colorimetric analysis, what percent transmission should a sample containing 0.2 mg/L produce in ana