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On a Friday afternoon, however, heavy traffic slows you down and you drive the same distance at an average speed of only 75.0 km/h . How much longer does the trip take?
when a current of 0.156A is passed through a solution of lead(II) nitrate, lead is deposited at the cathode. How long will it take to deposit 0.10g of lead?
What is the molality of a solution that contains 0.850g of ammoni NH3 in 125g of water?
A crystalline solid consists of atoms stacked up in a reapeating lattice structure. the atoms reside at the corners of cubes of side L=0.200nm. one piece of evidence for the regular arrangement of a
Calculate the boiling point of a solution of 500.0 g of ethylene glycol (C2H6O2) dissolved in 500.0 g of water. Kf = 1.86°C/m and Kb = 0.512°C/m. Use 100°C as the boiling point of water.
What is the specific heat capacity of a metal that has capacity of a metal that has a mass of 25.00 grams and absorbs 1000.0 j of heat in cooling from 80.0 c to 40.0 c?
What would the concentration of Br- and C5H5NH+ ion be if 0.15M of solid C5H5NHBr were dissolved in 1L of solution? Is pyridinium bromide an acidic or basic salt? Write a chemical equation as proof
What is the debroglie wavelength of a .500kg object moving at 20.00 m/sec
What is the molarity of each of the following solutions? You pipet 20.00 mL of 0.0600 M CuCl2 into a 100.00 mL volumetric flask and fill to the mark.
(a) If the radius of the curve is 150 m, what is the correct angle of banking of the road? (b) If the curve were not banked, what would be the minimum coefficient of friction between tires and road
You have successfully purified a protein to homogeneity. From gel permeation chromatography studies, you determine that the protein has a molecular weight for 235,000 daltons.
A hypothetical AX type material is known to have a density of 2.10 g/cm 3 and a unit cell of cubic symmetry with a cell edge length of 5.7Å.
Define molality. How many grams of na2co3 should be dissolved in 250grams of water to prepare 0.1?
Assume that the pressure and the temperature remain constant. What is the new volume of gas in liters when a leak allows one-half of the neon atoms to escape?
Analysis shows that there are 2.05 moles of H2, 8.98e-05 moles of S2, and 7.7 moles of H2S present in a 56.2 L flask at equilibrium. Calculate the equilibrium constant Kc for the reaction
A chemist wants to make 5.1 L of a 0.291 M CaCl2 solution. What mass of CaCl2 (in g) should the chemist use ?
Two boat landings are 1.0 km apart on the same bank of a stream that flows at 2.2 km/h. A motorboat makes the round trip between the two landings in 50 minutes. What is the speed of the boat relativ
What are the missing coefficients for the skeleton equation below?
A bag of potato chips contains 580 mL of air at 25°C and a pressure of 755 mm Hg. Assuming the bag does not break, what will be its volume at the top of a mountain where the pressure is 446 mm H
An aluminums container of mass 150 gm contains 250 gm of ice at -120C. Heat is added to the system at the rate of 420 joules per seconds. What is the temperature of the system after 3.5 minutes? Spe
Compare the amount of .200 moles of KOH needed to neutralize 50 mL of .200 moles of HNO3 with the amount of .200 moles of KOH needed to neutralize 50 mL.
A cannon is fired from the top of a castle wall. The cannonball is fired at a speed of 50 m/s and an angle of 30 degrees. A cannonnall that was accidently dropped from the top of the wall hits the
Consider the sodium sulfate/sodium bisulfate (Na2SO4/NaHSO4) buffeer system where Ka=1.1*10-2 for HSO4-. How Many grams of wach of these salts should you add to 1L of water in order to make the buf
A car drives straight off the edge of a cliff that is 49 m high. The police at the scene of the accident observed that the point of impact is 130 m from the base of the cliff. How fast was the car t
Block 1, of mass M1= 0.550, is connected over an ideal (massless and frictionless) pulley to block 2, of mass M2. Assume that the blocks accelerate as shown with an acceleration of magnitude a= 0.35