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A puddle of coastal seawater, caught in a depression formed by some coastal rocks at high tide, begins to evaporate on a hot summer day as the tide goes out. If the volume of the puddle decreases to 23% of its initial volume, what is the concentration of Na+ after evaporation if initially it was 0.449M?
What is the boiling point of a solution made by adding 6.79 g of magnesium chloride to 242.0 g of water?
If A container holds 355mL of a mixture of nitrogen also carbon dioxide gases. The container is found to have a little leak. Assume which gas is escaping faster
A compound is found to have a molar mass of 598 g/mol. If 35.8 mg of the compound is dissolved in enough water to make 175 mL of solution at 25°C, what is the osmotic pressure of the resulting solution?
Explain why selectivity in isocratic HPLC system ideally should not depend on eluent composition. (Use thermodynamic derivation to support your explanation).
2) Calculate the concentration of an aqeuous solution of Ca(OH)2 pH of 12.05.
a corporation produces output with a market price of 200 per unit. the marginal product of capital is 12k where k is
If the partial pressure of helium is the same as the partial pressure of oxygen, what do you know about the number of helium atoms compared to the number of oxygen molecules? explain.
What is the 3D root mean square distance traveled by a particle with a diffusion coefficient D of (10^-5) m^2 s^-1 after 1000s and 10000s
in a concentration calculation if we are given the solute measurement in grams and the volume of solution in liters
A silver electrode is placed in a saturated solution of AgBr. This half-cell is connected to a standard hydrogen electrode and the voltage is found to be +0.437 V. Calculate Ksp for AgBr.
Calculate the change in enthalpy for the dissolving of sodium carbonate. Assume no heat lost to the surroundings and the solution has a specific heat capacity of 4.18 J/g°C.
Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2 g of ammonia are reacted with 787.3 g of carbon dioxide. Which of the two reactants is a limiting reactant.
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