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A 5.00 mL sample of barium hydroxide is titrated to the phenolphthalein endpoint using hydrochloric acid. the five mL sample requires 18.02 mL of 0.0873 M HCl solution to reach the endpoint. what is the concentration of the Ba(OH)2 solution?
Ba(OH)2 (aq) + 2 HCl (aq) ------> BaCl2 (aq) + 2H2O (l)
Suppose that each sphere represents 6.7×1021 molecules and that the volume of the container is 1.0 L. What is the rate constant for the reaction in the usual units?
Calculate the equilibrium partial pressures of all species when CO and Cl2, each at an intitial partial pressure of 1.53 atm, are introduced into an evacuated vessel at 600 K.
Consider the reaction N2(g) + 3 H2(g) 2 NH3(g), which is exothermic as written. What would be the effect on the equilibrium position of adding a suitable catalyst
Why is it important to apply the sample to the column in the smallest amount of solvent possible? what would happen if you used to much
The melting point of water is 0.000C at 1 atmosphere. If 11.64 grams of chromium(II) acetate, (170.1 g/mol), are dissolved in 287.2 grams of water .what is the molarity?
the concentration of mg2 in a sample of water is 262 mmoll at what ph will 99 of the mg2 be precipitated as mgoh2? ksp
If the heat capacity of the calorimeter is 32.30 kJ·K-1, how many nutritional Calories are there per gram of the candy
What is the resultant pressure if 3.7 mol of ideal gas at 273 K and 1.97atm in a closed container of constant volume is heated to 446 K.
what mass of potassium bromide residue remains if 500.0 ml of 0.200 m potassium bromide solution are evaporated to
How many Valence electrons does a balanced atom of Sodium have? What is the net charge on each ion?
1. Consider treating polyenes, ethylene, butadiene, hexatriene, etc., with the one-dimensional particle-in-the-box model. What length polyene (i.e., number of C atoms) is required to absorb light in the red region of the spectrum? How does tha..
Polycyclic aromatic hydrocarbons (PAHs) are a class of organic chemicals associated with the combustion of fossil fuels. Undeveloped areas may have total PAH soil concentrations of 5 µg/kg
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