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A 3.46 g sample of zinc heated to 95.4 C was dropped into 50 g of water at 20.7 C in a calorimeter. The temperature rose to 21.2 C. What is the specific heat of zinc?
Calculate the maximum [glucose]in/[glucose]out ratio that can be achieved by the plasma membrane Na+- Glucose antiporter of an epithelial cell when the concentration of Na+ inside the cell is 7mM
A copper wire (density = 8.96 g/cm3) has a diameter of 0.41 mm. If a sample of this copper wire has a mass of 12 g, how long is the wire?
A certain reaction has ?H equal to 11.57 kJ/mol. This reaction is normally run at room temperature (25?C). At what new temperature should the reaction be run so that K is twice its value at 25?C?
Given the reactant side of the total ionic equation for the neutralization reaction of ammonium hydroxide (NH4OH) with hydrochloric acid (HCl), write the total ionic equation
What is the half life of a first order reaction if it takes 4.4 x 10-2 seconds for the concentration to decrease from an initial concentration
(a) electric dipole moment in one dimension (b)the mean square deviations of the position and momentum of a particle in one dimension from the mean values.
Write the net ionic equation describing the oxidation of mercury to HgO by O2 in a basic aqueous solution.
A 706 mL gas sample at STP is compressed to a volume of 248 mL, and the temperature is increased to 39?C. What is the new pressure of the gas in Pa.
Compute the number of electrons in a flake of pure gold valued at $0.5. Assume that the price of gold is $1426.0/troy oz.
Determine ΔHreaction° for: 4H2O (l) + 2 NH3 (g) → 2NO2 (g) + 7H2 (g) using the following two equations: (1) N2 (g) + 3H2 (g) → 2 NH3 (g) ΔH1° = -184 kJ (2) 4NO2 (g) + 8H2 (g) → 2 N2 (g) + 8 H2O (l) ΔH2° = -196 kJ
Suppose you have just added 200.0 ml of a solution containing 0.5000 moles of acetic acid per liter to 100.0 ml of 0.5000 M NaOH. What is the final pH? The Ka of acetic acid is 1.77 x 10^-5
what mass of magnesium is required to produce enough gas to exert a partial pressure of .50 atm in a 50.0 mL flask at a temperature of 25.0 degrees celcius?
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