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Imagine that a beaker of pure water and another beaker containing water and some NaCl are both boiling under 1 atm pressure. Which of the following statements do you think is correct for this case? Please explain.
a) both liquids are at the same temperature, and they have the same vapor pressures,
b) the liquids will be at different temperatures and vapor pressures,
c) the liquids will be at the same temperature, but the vapor pressures will differ,
d) the liquids will be at different temperatures, but the vapor pressures will be the same.
Consider that sodium hydroxide is added to acetic acid (CH3COOH). What is the direction of equilibrium and by how much. Pka of Sodium Hydroxide
What is the experimental yield (in g of precipitate) when 18.6 mL of a 0.634 M solution of barium hydroxide is combined with 19.5 mL of a 0.558 M solution of aluminum nitrate at a 85.4% yield
A 2kg sample of lead is heated from a temperature of 30 degrees celsius to a temperature of 60 degrees celcius. The specific heat of lead is 128 J/kg degrees celsius. How much heat energy di this sample absorb?
lead nitrate is needed to precipitate all of the chloride ion in a 10.00-mL sample of an unknown. What is the molarity of the chloride ion in the student's unknown?
A 397 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 639 mmHg. Calculate the moles of Ar present
The reaction of 2,2-dimethyl-1-propanol with HBr is very slow and gives 2-bromo-2-methyl-propane as the major product
Solid silicon and solid magnesium chloride form when silicon tetrachloride gas reacts with magnesium metal. Write a word equation and an unbalanced formula equation. Include all of the appropriate notations.
A stock solution of 1.24 x 10^-4 M dye is available in the lab. What volume of the stock solution must be transferred to a volumetric flask to prepare a 25.00 mL dilution with a concentration of 2.00 x 10^-5 M
A first order decomposition reaction is observed to have the following rate constants at the indicated temperatures. using an Arrhenious plot, find the activation energy
A 25.0-mL sample of 1.00 M NH3 is titrated with 0.10 M HCl. What is the pH of the NH3 before the titration begins? Kb = 1.8 × 10-5
Peptide hormones must bind to receptors on the extracellular surface of their target cells before their effects are communicated to the interior. In contrast, receptors for hormones such as estrogen are intracellular proteins. Why is this possible..
A hypothetical salt AxBy crystallizes in the cubic syatem. The unit cell mass has atoms of A at each corner plus on at (1/2,1/2,/1/2) and atoms of B at positions (0,1/2,1/2).
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