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When the actual measured mass of an atom is compared to the sum of the component subatomic particles (electrons, protons, and neutrons), the mass of the isotope is always smaller. This mass loss or defect has been converted to energy in the formation of the atom. The energy equivalent of the missing mass is known as the total nuclear binding energy and can be calculated from the mass defect. Binding energies are often expressed in electronvolts (). The mass defect can be related to this energy term as
where a mass change of 1 corresponds to an energy release of . Often in such calculations the total mass of an electron (0.0005485 ) and a proton (1.0072765 ) is expressed in terms of the mass of a atom, or 1.0078250 .
The predominant isotope of gold, , has an experimentally determined exact mass of 196.967 . What is the total nuclear binding energy of gold in electronvolts per atom?
which one is oxidizing agent and which one is reducing agent?
Calculate delta rG^o for the reaction below at 25 degrees C. CS2(g) + 3Cl2(g) -> S2Cl2(g) + CCl4(g) given delta rH^o = -231.1 kJ/mol-rxn and delta rS^o = -287.6 J/K*mol-rxn
The Ka for hypochlorous acid (HClO) is 3.0 x 10?8. What is [OH?] in a 0.145 M solution of sodium hypochlorite (NaClO)
A sample of H½O with a mass of 46.0 grams has a temperature of -58.0 àC. How many joules of energy are necessary to heat the steam from 100.0 àC to 114.0 àC if the specific heat of steam is 2.01 J/g àC?
What is the ph of a solution that results from diluting .30 mol acetic acid and .20 mol sodium acetate with water to a volume
A news station in your local area has predicted a severe winter storm on the way and they want to make sure the streets don't freeze over. Which solution should they use to put on the streets to lower the freezing point, MgCl2 or NaCl, and explain..
How many moles of oxygen are generated during the thermal decomposition of 7.75 g of lead (IV) oxide
How much heat in kilojoules is evolved or absorbed in the reaction of 233.0 g of calcium oxide with enough carbon to produce calcium carbide. Is the process exothermic or endothermic
Nitrogen and oxygen form an extensive series of at least seven oxides with the general formula NxOy. One of them is a blue solid that comes apart, reversibly, in the gas phase. It contains 36.84% N. What is the empirical formula of the oxide
What do you expect will happen to the position of this equilibrium when the total pressure of the gases in the reaction mixture is doubled by injecting some argon (Ar) while maintaining the temperature constant.
How many grams of aluminum oxide are produced when 50.3g aluminum react, When 0.510 mole aluminum is reacted in a closed container with 7.90g oxygen, how many grams of aluminum oxide can form?
how many liters of h2 gas at stp can be produced by the reaction of 4.60g of na and excess water accoring to the
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