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When the nuetron to proton ratio in a raditoactive isotope is higher than that required for stability, it main gain greater stability by emitting
1. neutron radiation
2. positron radiation
3. beta radiation
Emission of the following particle(s) has (have) a very small effect on the mass of an atom.
1. beta particle
2. neutron
3. alpha particle
A nucleus with an excess of neutrons would be expected to undergo nuclear decay by the emission of a
A. deutron
B. neutron
C. neutrino
D. beta particle
E. gamma ray
The ionization energy of an atom compared to the binding energy of its nucleus is
A. much greater
B. slightly greater
C. the same
D. slightly smaller
E. much smaller
Nitrosyl bromide, NOBr, is formed in the reaction of nitric oxide, NO, with bromine,Br2 : 2NO(g)+Br(g) 2NOBr(g) The reaction rapidly establishes equilibrium when the reactants are mixed
At noon on a clear day, sunlight reaches the earth's surface at Madison, Wisconsin, with an average power of approximately 8.00 kJ·s-1·m-2. If the sunlight consists of photons with an average wavelength of 510.0 nm
Calculate the partition coefficient of caffeine between water and each of the other three solvents. Which of these three organic solvents would be the best choice for extracting caffeine from an aqueous solution?
Calories given off when 83g of water cools from 48 degrees Celsius to 27 degrees Celsius.
Find the enthalpy delta H of the formation of liquid water in the standard state. g) Find the value U of the molar internal energy of water at standard conditions.
2NOCl(g) → 2NO(g) + Cl2(g) ,At 450 K the rate constant is 15.4 atm-1s-1. How much time (in s) is needed for NOCl originally at a partial pressure of 46 torr to decay to 25.8 torr.
How many grams of formic acid, HCOOH, must be added to 0.160 L of 0.150 M sodium formate, HCOONa, to yield a buffer solution with a pH of 4.30? Assume no volume change. Ka of HCOOH = 5.0 10-4.
How are the princible of Le chatelier's used to increase the percentage yield in the production of ammonia in the haber process?
if the freezing point of a 0.107 m CH3COOH solution is -0.200°C, calculate the percent of the acid that has undergone ionization.
What volume of 3.02 M HNO3 can be made by diluting 142 mL of concentrated nitric acid (16.0 M HNO3)?
What is the molality of a solution prepared by dissolving 10.0 grams of methylamine, CH3NH2, in 50.0 mL of ethanol, C2H5OH?
A nitric acid solution containing 71.0% HN)3 (by mass) has a density of 1.42 g/mL. How many moles of HNO3 are present in 1.00L of this solution?
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