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The standard enthalpy of atomization of an element is the energy necessary to convert one mole of an element in its stable form at 25 degree Celsius to one mole of monoatomic gas. As long as the standard enthalpy of atomization of sodium is 108.5KJ/mole, compute the energy in kilo joules necessary to convert 5.60 mole of sodium metal at 25 degree Celsius to 5.60mole of gaseous Na+ ions the ionization energy of Na gas is 495.9KJ/mole
How many mL of 1.183 M H2SO4 must be added to 18.22 mL of 0.531 M NaOH to just completely react all of the NaOH according to the equation
What is the half life? How long would it take for the concentration of CH3NC to decrease to 75% of its initial value? to 30% of its initial value
write a balanced equation for the reaction and find the mole ratios of the reactants and products. find the volume of oxygen in liters formed at 25 *C if the gas is collected over mercury under an atmospheric pressure of 670 torr.
Explain the fact that KOH is much more soluble in liquid ammonia containing a little water than in pure liquid ammonia.
calculate the mass of propylene glycol c3h8o2 that must be added to 0.340 kg of water to reduce the vapor pressure by
Using words and pictures, explain why impurities usually lower the melting point of a substance. Next, imagine a case where an impurity actually RAISES the melting temperature of a pure substance
Suppose a reaction has a standard Gibbs-free energy of -15.1 kJ/mol, calculate the relative ratio of product to reactant.
Using the data table below solve for the volumes of the acid and the base that were used during this titration. Determind the molarity of the sodium hydroxide solution.
How many grams of Cu(OH)2 will precipitate when excess KOH solution is added to 63.0 mL of 0.610 M CuSO4 solution.
The formation constant Kf for the complex ion Zn(OH)42- is 2.8 1015. What is the concentration of zinc ion, Zn2+, in a solution that is initially 0.50 M in Zn(OH)42-
By how much does the chemical potential of benzene change when the pressure exerted on a sample is increased from 100kPa to 10MPa
Hydrochloric acid (HCl) reacts with sodium carbonate (Na2CO3), forming sodium chloride (NaCl), water (H2O), and carbon dioxide (CO2). This equation is balanced as written: 2HCl(aq)+Na2Co3(aq) --- 2NaCl(aq)+H2O(I)+CO2(g)
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