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A protein subunit from an enzyme is part of a research study and needs to be characterized. A total of 0.180 g of this subunit was dissolved in enough water to produce 2.00 \rm mL of solution. At 28 ^\circ \rm C the osmotic pressure produced by the solution was 0.138 \rm atm. What is the molar mass of the protein?
A student mixes 99.1g of water at 80.1C with 32.5g of water at 27.3C in an insulated flask. What is the final temperature of the combined water
Choose the stronger of each pair of acids, respectively, and explain why: a) HBrO3 or HBrO b) HBrO2 or HIO2 A. a) HBrO because Br has a lower oxidation state (fewer number of O atoms around it) in HBrO than in HBrO3
A mixture of gases contains 1.35 g of N2, 2.64 g of H2, and 2.38 g of NH3. If the total pressure of the mixture is 1.64 atm, what is the partial pressure of each component. PN2 atm PH2 atm PNH3 atm
Calculate the osmotic pressure of a solution containing 24.9g of glycerin (C3H8O3) in 238.0mL of solution at 300 K.
An open flask sitting in a lab fridge looks empty, but we know that actually it is filled with a mixture of gases called air.
Determine the energy of an electron in the given quantum level of each of the following ions. (Hint: Each of the ions has a different number of protons
We titrated a 0.1033 M NaOH solution into an unknown concentration of a weak acid (25.00 mL). It also says the unknown acid will have a concentration of about 0.1 M.
You start with 100.0 mL of a 0.2500 M solution of NaCl sitting in a beaker. After several days you test the solution and find that it is now 0.3125 M. How much water must have evaporated?
a student boils the water in which he is attempting to dissolve his aspirin tablet which weighs 392 mg for several
Calculate the change in energy required in making 70.0 mL of water from its elements under standard conditions
Atoms, such as sodium, typically give line spectra, as opposed to continuous spectra. Given that such spectra are due to changes in the energies of electrons, explain, using a suitable diagram, what this tells you about the electronic structure of..
Write a balanced molecular equation and a net ionic equation for the reaction aluminum hydroxide with a solution of hydrobromic acid. Include the states of each species.
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