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Calculate the total heat in joules needed to convert 25.00 g of ice at -3.50 degrees c to liquid water at 0.250 degrees c.
A buffer is to be prepared by adding solid sodium acetate to 0.10 M CH3COOH. Which of the following concentrations of sodium acetate will produce the most effective buffer
From the same container under the same conditions--same temperature and initial pressure, it takes 40 s for 1.00 L of O2 gas to effuse. Calculate the molar mass (in grams/mol) of the unknown gas.
A 5.0×101 sample of water absorbs 355 of heat.If the water was initially at 25.9, what is its final temperature.
Write a chemical equation representing the second ionization energy for lithium. Use e- as the symbol for an electron.
a mole of atoms ions molecules or anything else contains avogadros number 6.022 x 1023 of these units. a mole of
What are the major species present in 0.250 M solution of each of the following acids. Calculate the pH of each of these solutions.
Calculate the mass of sodium hydroxide that must be added to 1.00 L of 1.00 M HC2H3O2 to double the pH of the solution (assume that the added NaOH does not change the volume of the solution)
Equal mass samples of three liquids, A, B and C are obtained. The initial temperatures are 14 C, 24 C, and 40 C for liquids A, B, and C, respectively. If liquids A and V are mixed, the final temperature is 20 C and if liquids V and C are mixed, th..
Consider the neutral form of the amino acid histidine a) When the neutral form of the amino acid histidine (HA) is titrated with HClO4, write the sequence of reactions that occur. Draw structures of reactants and products.
When PCl3(g) (420.9 grams) and 0.007859 mol/L of Cl2(g) in a 390.0 L reaction vessel at 340.0 °C are allowed to come to equilibrium the mixture contains 200.7 grams of PCl5(g). What concentration (mol/L) of PCl3(g) reacted? PCl3(g)+Cl2(g) = PCl5(g..
Show how many µL of protein sample you will take and add with the desired volume of DTT and Laemmli buffer to make the right concentration of sample.
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