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Which of the following conceps best describes the reason that atoms are larger and electron energies are weaker as you go down the periodictable?
1. electronegativity
2. stable ?lledshells
3. increased protondensity
4. shielding
5. Aufbau Principle
thermal equilibrium is reached, the temperature of the aluminum sample plus water mixture is 29.4 degrees C. What is the specific heat of aluminum
Compute the free energy change needed for transport of sufficient protons to make gastric juice of 1 litter at the temperature of 37 degree celsius hence expect above reaction will happen spontaneously?
If molar magnetic susceptibility (Xm) is measured in m^3/mol, what must be the units on B(calibration constant)? what are the units on the 3.7278 in the formula for the magnetic susceptibility of Mohr's salt? what are the units on the 8.07 in the ..
Hydroxyl radical (OH) is produced from the photolysis of H2O or through reaction with excited oxygen, H2O + hν --> H + OH or O* + H2O---> 2OH
A mass of 1.50 g H2O is sealed in an evacuated 3.0-L flask and heated to 55 °C. What mass of liquid water remains in the flask when equilibrium is established? The equilibrium vapor pressure of water at 55 °C is 118 mm Hg.
Calculate the molality of a solution that contains 56.5g of benzoic acid, C6H5COOH, in 350mL of ethanol, C2H5OH. The density of ethanol is 0.789g/mL.
A zero-order reaction has a constant rate of 1.00×10-4 . If after 80.0 seconds the concentration has dropped to 6.50×10-2 , what was the initial concentration.
What is the gas pressure (in atm) inside a 2.43-L bulb that contains 2.88-g of Ne at a temperature of 32.9 C?
Write a chemical equation for the reaction corresponding to the standard enthalpy of formation of N2O5 (g) and determine its value from the following thermochemical data
Based on the Henderson-Hassalbach equation how many mmols of Tris-HCl are there in a 100 mL of a 100 mM Tris-HCl buffer solution at pH 8.1? Note that the 100 mM refers to the sum of Tris and Tris-HCl concentrations.
What are the concentrations of HSO4-, SO42-, and H+ in a 0.20 M KHSO4 solution? (Hint H2SO4 is a strong acid; Ka for HSO4- = 1.3x10-2)
nathen and su-liu have new jobs at the fun house. they have been given the job of counting the balls in the kiddie
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