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Compute the number of electrons in a flake of pure gold valued at $0.22. Assume that the price of gold is $1487.0/troy oz. (1 troy oz = 31.1 g)
A student prepared a stock solution of the assigned compound by weighing 2.345 grams of Cu(NO3)2. 6H20 and diluting it with water to a final volume of 25.00mL.
Ethylene glycol, HOCH2CH2OH, is effective as an antifreeze, but it also raises the boiling temperature of automobile coolant, which helps prevent loss of coolant when the weather is hot. a. What is the freezing point of a 50.0% solution of ethylen..
Calculate the mass deficiency in amu, binding energy in J/atom, and binding energy in MeV/nucleon for zinc-64, with an actual mass of 63.9291amu
4 c3h5o9n3l rarr 12 co2g 6 n2g o2g 10 h2oga if a sample containing 2.03 ml of nitroglycerine density 1.592 gml is
A solution of ethanol (C2H5OH) in water is prepared by dissolving 10.0mL ethanol (density is 0.79g/cc) in enough water to make 250.0mL of solution. What is the molarity of the ethanol solution?
Determine the pH of a solution with .12M of sodium acetate at 25 degrees C. Ka=1.8x10^-5
Aluminum is a lightweight metal (density=2.70 g/cm^3) used in aircraft construction, beverage cans, and foils. a) What is its density in kg/m^3? b) How many pounds would an aluminum clock measuring 1.0 m x 2.0 m x 1.5 m weigh
Write the reaction for the electrolysis of molten RbCl. Do not include physical states in the reaction. Include balancing coefficients (use only whole numbers).
a sample of H2O with a mass of 46.0 grams has a temperature of -58.0 C. how many joules of energy are necessary to heat the steam from 100.0 degrees Celcius to 114.0 degrees celcius if the specific heat of steam 2.01J/g degrees celcius.
when the level in the arm connected to the container is 766.0 mm in height higher than the level in the arm open to the atmosphere? Atmospheric pressure is 754.2 mm Hg and the density of mercury is 13.546 g/mL.
A container (8.65-L ) holds two gases mixture at 31 °C. The partial pressures of gas X and gas Y, respectively, are 0.206 atm and 0.867 atm. If 0.200 mol a third gas is added with no change in temperature or volume determine the total pressure be..
If the end of the crutch is a circle of radius 1.2 cm without the tip, and the tip is a circle of radius 2.3 cm, by what factor does the tip reduce the pressure exerted by the crutch?
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