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How many electrons must be removed from each of two 5.0-kg. copper spheres to make the electric force of repulsion between them equal in magnitude to the gravitional attraction between them?
Consider a major oil spill in a lake( a prototyperelated to Alaska Oil Spill few years ago and many subsequentspills). Amount of oil spilled is 5.80 mega gram(Mg). We can assumeoil and water don't m
A spherical shell has inner radius Rin and outer radius Rout. The shell contains total charge Q, uniformly distributed. The interior of the shell is empty of charge and matter. (a) Find the electric
Three test charges, each with a charge of +1x10-6 C, are located at the points of an equilateral triangle. If the legs of the triangle are 10 cm long, what is the total force acting on each charge?
An advertisement claims that a particular automobile can "stop on a dime". What net force would actually be necessary to stop an automobile of mass 900 kg traveling initially at a speed of 46.0 km/h
Why are the formal charges zero? i thought what you did was take the number of valence electrons then subtract the number of bonds the element has..?
The intensity (in W/m2) of one sound is 6.04 times as great as the intensity of another sound. Relative to the quieter sound, what is the intensity level ß of the louder sound?
Calculate the amount of heat needed to convert 96g of ice at -24 degrees Celcius to water at 28 degrees Celcius. The specific heat capacity of H2O(s) is 2.1 J/(g degrees Celcius).
A fire hose exerts a force on the person holding it. This is because the water accelerates as it goes from the hose through the nozzle. How much force is required to hold a 7.5 cm-diameter hose del
How much energy (in kilojoules) is released when 14.6 g of steam at 121.0 C is condensed to give liquid water at 67.5 C ? The heat of vaporization of liquid water is 40.67 kj/mol , and the molar hea
Why must a water skier moving with constant velocity lean backwards? What determines how far back she must lean? Draw a free-body diagram for the water skier to justify your answers.
She particularly enjoys pickling and decides to pickle olivesover a leisurely weekend. According to the recipe, she needs to addthree teaspoons of salt to one cup of diced olives.
If you have a mixture of 10 lb. sunflower seeds whichcost 32 cents per pound and 16 lb of cracked corn whic cost 18cents per pound, how much will this mixture cost perpound.
The energy levels the electron can occupy in theHe+ ion can be calculated using the energy levelequation. Calculate the energy in kJ/mol of the electron when it isin the n= 5.00 level.
Explain why some molecules are best represendted by resonance structures, and how these structures indicate the actual structure of the molecule.
A bottle of concentrated aqueous sulfuric acid, labeled 98wt% H2SO4 (MW 98 g/mol), has a concentration of 18.0 M. How many mL of this reagent should be diluted to 1 L to give a1M H2SO4?
What is the molarity, molality, weight percent and ppm of NaCl(MW=58.4 g/mol) when 100g of this compound is dissolved in 500mL of water such that the density of the final solution is 1.16 g/mL?Assum
A light-year is the distance light (speed = 2.998 108 m/s) travels in one year. (a) How many meters are there in 16.0 light-years?
The daily dose of ampicllin for the treatment of an ear infection is 115mg/kg of body weight. What is the daily dose for a 34 lb child?
An air-filled parallel-plate capacitor has a capacitance of 1.4 pF. The separation of the plates is doubled and wax is inserted between them. The new capacitance is 2.4 pF. Find the dielectric cons
What is the empirical formula of a hydrocarbon if completecombustion or 7.000 mg of the hydrocarbon produced 22.781 mg ofCO2 and 6.994 mg of H2O? Be sure to write Cfirst in the formula.
A charged isolated metal sphere of diameter 12 cm has a potential of 8500 V relative to V = 0 at infinity. Calculate the energy density in the electric field near the surface of the sphere.
A chiral carboxylic acid A (C5H6O2) reacts with 1mol of hydrogen gas on catalytic hydrogenation. the product is anachiral carboxylic acid B (C5H8O2). What are the structures of Compounds A and B?
A 1000kg cart is rolling to the right at 5.0m/s. A 70kg man is standing on the right of the cart. What is the speed of the cart if the man starts running to the left with a speed of 10m/s relative t
Eighty-six proof whiskey is 43 percent ethylalcohol, CH3CH2OH, by volume.If the density of ethyl alcohol is 0.79 kg/L, what is its molarity in whiskey?