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the speed of a photon is 4.5x10^5 ms^-1. If the uncertainty in its momentum is to be reduced to .01 percent, what uncertainty in its location must be tolerated
Calculate the volume of each of the following gas samples at STP 8.1 mol c2h2, .255 mole ci,0440 mol co2, 24.1 mol n2o in L
Assume that the kinetic energy of a 1500kg car moving at 95 km/h can be converted entirely into heat. What amount of water could be heated from 20 C to 50 C by the car's energy?
How many grams of calcium chloride should be formed from the reactions of hydrochloric acid and calcium hydroxide? If the reaction in 2.4 only produces 3.0 g calcium chloride, calculate the percentage yield of calcium chloride.
15.0 mL of 0.50 M HCl is added to a 100.-mL sample of 0.496 M HNO2 (Ka for HNO2 = 4.0 × 10-4). What is the equilibrium concentration of NO2- ions?
Constant pressure molar heat capacity of a compound is found to vary with temp, according to molar cp= 15.25 +.138* T--2.21*10^4/T^2 Calculate the enthalpy change when 1 mole of this compound
Calculate the pH of a buffer solution made by mixing 46.8 g of sodium acetate into 1 L of a 0.1 M solution of acetic acid. Give the pH to two decimal places.
The chlorinator feed rate is 4.0 mg/L and the free chlorine residual is 1.5 mg/L. (a) What is the chlorine demand (mg/L)? (b) How many kg of chlorine must be fed to the plant on a daily basis?
Important information about Nitration, Explain why nitration of 1,4-dichloro-benzene yields the mononitro derivative while N,N'-diacetyl-1,4-phenylenediamine forms
Complete and Balance the following redox equation. MnO4 + H +Br-->Mn2 +Br2 +H2O (acidic Solution). The sum of the smallest whole number coefficients is
Tincture of iodine is I2 dissolved in ethanol, C2H5OH. A 1% solution of tincture of iodine is 10.0g of solute for 1000. g of solution. How many grams of solvent are present in 1000. g of this solution? How many moles of solute are in 10.0g of I2? ..
how many kilojoules of energy are needed to convert 100 g ice at 10.0C to water at 20.0C? (the specific heat of ice at 10C is 2.01)
Draw the expanded structural formula for the following condensed formula.
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