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What is the H+ concentration of an aqueous solution with a pOH= 4.38 at 25 degrees celcius.
how many g of A will be transferred to the new ether layer? (K remains the same, even though the number of g of A being partitioned is smaller. How many total g of A have been extracted into the two ether fractions?
how much energy is released when 89 grams of water vapor (steam) is cooled from 503 K to 354 K?
Suppose that a student collects the following spectrophotometric data to determine the relative concentrations of HMR and MR in solution:
At constant pressure, 660 mL of nitrogen at 37°C are changed to 725 mL What is the new temperature of this gas?
Given a restriction enzyme that has a concentration of 50 units/ml but your experiment requires that the concentration be reduced to 2.5 units/ml.
A particular first-order reaction has a rate constant of 1.35 × 10^2 s-1 at 25°C. What is the magnitude of k at 75°C if Ea = 85.6 kJ/mol?
A solution made by dissolving 1.20 g of the unknown compound in 25.0 g of benzene had a freezing point of 4.7 degrees Celsius
The k1 is on top of the right pointing arow and k2 is below the left pointing arrow and the arrows are like they are in equilibrium. The k3 is above the lone arrow in the second reaction. In the find expression part the N02 is a subscript of P
A solution is made by dissolving 15.5 grams of glucose (C6H12O6) in 245 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m?
Consider the following reaction: 2 HI(g) -> H2(g) + I2(g) If 3.55 moles of HI(g), 0.550 moles of H2, and 0.630 moles of I2 are at equilibrium in a 1.00 L container at 915 K
calculating theoretical yield for this experiment. It is a dehydration synthesis where one mol of hydrated salt yields 3 mol hydrates and 1 mol of anhydrous salt.
The element lanthanum has two stable isotopes, lanthanum-138 with an atomic mass of 137.9 amu and lanthanum-139 with an atomic mass of 138.9 amu
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