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To a buffer solution containing 0.100M of HNO2 and 0.150M of KNO2 with calculations determine if the added amount of the following compounds exceeds its buffer capacity.250mg of NaOH
How many sodium ions are needed to provide the free energy to transport a molecule of glutamic acid from a concentration of 0.1 mM outsie the cell to 20mM inside the cell given a concentration of Na+ of 140 mM outside the cell to 10mM inside the c..
a 251 mL sample of oxygen is collected over water at 25 deg C and 760 torr pressure. If the vapor pressure of water as 25 deg C is 23.8 torr, what is the pressure of the dry gas alone?
Substances A2, B2, and C2 can act as oxidizing agents. Solution A2 is green, B2 is yellow, and C2 is red. In the reactions in which they participated they are reduced to A-, B-, and C- ion, all of which are colorless
a 4.0 g sample of iron was heated from 0 degrees celsius to 20 degrees celsius. it absorbed 35.2 j of heat. what is the specific heat of this piece of iron?
question 0.100 moles of naoh are combined with 0.125 moles acetic acid. the mixture is taken to a final volume of
The osmotic pressure of a solution formed by dissolving 85.0 mg of aspirin (C9H8O4) in 0.250 L of water at 25 °C is __________ atm.
30 mol H2 and .30 mol I2 are mixed in a 1.00L container, and the reaction forms HI. If Kc=.49 for this reaction, what is the equilibrium concentration of HI. I2(g) + H2(g) --- 2HI(g)
What is the main structural feature of the azo dyes that causes them to be colored compounds? Methyl Orange is an acid-base indicator. In dilute solution at pH greater than 4.4, it is yellow.
The observed temperature increase is 2.64 °C. If the heat capacity of the calorimeter is 32.30 kJ·K-1, how many nutritional Calories are there per gram of the candy
What is the maximum kinetic energy of an ejected electron if platinum metal is irradiated with 174-nm light? The threshold wavelength for a platinum metal surface is 212 nm.
A beam of electrons (m= 9.11e-31 kg/electron) has an average speed of 2.4e8 m/s. What is the wavelength of electrons having this average speed in pico meters
A particular first order reaction has a rate constant of 1.35 times 10^2 s^-1 at 25 degrees C. What is the magnitude of k at 95.0 degrees C if Ea=55.5kj/mol
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