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In the laboratory, dissolve 21.6 g of sodium phosphate in a volumetric flask and add water to a total volume of 375 mL.
Find the mathematical relationship that relates energy of a photon emitted as an electron relaxes from a higher energy level to a lower energy level in a hydrogen atom. Use this equation to calculate the wavelength of the photon emitted in units o..
how many kilojoules of heat are absorbed when 7.20g of mgos is decomposed into mgs and o2 g at constant
The molar mass of an oxygenated hydrocarbon substance is 88.0 g / mole.Its composition is as follows:O:36.4%,H :9.0%,C:54.6%.Calculate the empirical formula and molecular formula.(use atomic mass C=12.0,H=1.0,O=16.0)
the resulting solution is found experimentally to freeze 4.3 degrees Celsius lower than pure naphthalene. If the freezing point depression constant for naphthalene is 6.85 degrees Celsius per mole (C/m), compute each of the following
What is the total pressure in a 25.0 L flask 20.0°C, which contains 0.127 moles of H2 and 0.288 moles of N2?
its molar mass is 71.61 g/mol, how many grams of this compound must you burn to release 866.80 kJ of heat?
(A) What are the consequences of early melting on the lifecycle of river dwelling fish? (B) Which of these do you think poses the greatest threat to fish?
What are the restrictions on free rotation?free rotation : N-Cα-C
Use the Henderson-Hasselbalch equation to calculate the pH of each solution: a solution that is 0.140 in propanoic acid and 0.125 in potassium propanoate.
If the pressure during the reaction stays CONSTANT (but the volume can change, like in a piston or balloon), which of these reactions do work on the surroundings
a chemical is placed in a beaker containing 20 g of soil and 500 ml of water. at equilibrium the chemical is found in
enormous numbers of microwave photons are needed to warm macroscopic samples of matter. a portion of soup containing
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