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A substance, B, has a normal boiling point of +89.3 °C, and its enthalpy of vaporization of 260 J g-1. To change 150 grams of B from a liquid at 89.3 °C to a gas at 89.3 °C will require how many joules?
Identify and describe the structure and function of specialised cells of protection, sensation and secretion in the integumentary system
Calculate the number of moles of bromobenzene this represents; then calculate the amounts of all other reagents needed in this experiment relative to this amount of bromobenzene.
Consider a 1.0-L sample of helium gas and a 1.0-L sample of argon gas, both at room temperature and atmospheric pressure. Answer the following questions: a. Do the atoms in the helium sample have the same average kinetic energy as the atoms in the..
The energy bar contains 100 mg of sodium, which constitutes 4% of the maximum recommended daily intake of sodium.
A beaker with 1.50×102mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 7.20mL of a 0.330\it M \rm HCl solution to the beaker.
Determine the formation constant, Kf, of AC5. Kf=? The solubility of AB(s) in a 1.000-M solution of C(aq) is found to be 0.152 M. What is the Ksp of AB? Ksp=?
identify and discuss three key features associated with the combustion of polymeric materials or compounds that are
Ionization energy is defined as the amount of energy input that is needed from an outside source to remove an electron from an atom. Ionization, in the quantum view, corresponds to raising an electron to the n = 1 electronic state.
Suppose you carried out the decomposition reaction using 25.0 mL reaction solution (i.e. 15.0 mL of a 6.0% hydrogen peroxide and 10.0 mL of there reactants or solvent) and obtained the following results. What would be the concentration of oxygen if..
By how much will the pH change if 0.025 mol of HCl is added to 1.00 L of the buffer that contains 0.15MHC2H3O2and 0.25MC2H3O2-? UseKa= 1.8 × 10-5for HC2H3O2.
The reaction of 2,2-dimethyl-1-propanol with HBr is very slow and gives 2-bromo-2-methyl-propane as the major product
How many mmoles of HCl do you add every time you added 500ul of 2M HCl to the .25M tris solution. how many mmole sof HCldo you add each time you added 500 ul of .2M HCl to 25mM tris solution
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