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What is the pH of a solution made of 10 mL of 0.1 M Nh3 (aq) (K = 1.8 X 10^-5) when mixed with 10 mL of 0.1 M NH4Cl?
A compound contains C, H and S. Elemental analysis performed on 172.5mg sample produced 299.0mg CO2 and 163.2mg H2O. What is the correct empirical formula
lead(II) sulfide was once used in glazing earthenware. It will react with hydrogen peroxide to form lead (ii) sulfate and water. How many grams of hydrogen peroxide are needed to react completely with 265g of lead(ii) sulfide?
what volume of a 0.500 M HCL solution is needed to completely neutralize 10.0ml of a 0.200M Ba(OH)2 solution
Use the equilibrium constants to calculate DeltaGo for the formation of [Cr(NH3)6]2+, [Cr(en)3]2+, and [Cr(dien)2]2+ from [Cr(H2O)6]2+ and NH3, en, or dien, respectively.
What is the molar absorptivity of the unknown compound. What is the concentration of the compound in a solution, if the absorbance of the solution in a 1.00 cm cell at 520 nm is 0.320
calculate the mass of magnesium that is required to produce 35.8ml of hydrogen gas at 28°c and a barometric pressure of 745 mmHg when collected over water?
For the reaction 2CH4(g) +3Cl2(g) -> 2CHCl3(l) + 3H2(g), the standard enthaly of change of reaction = -118.6KJ. The standard enthalpy of change of reaction
Find out how many total moles of gas are produced If a sample has 2.10 mL of nitroglycerine (density = 1.592 g/mL) is detonated?
A solution of an unknown nonvolatile electrolyte was prepared by dissolving 0.250 g of a substance in 40 g of CCl4. The boiling point of the resultant solution was 0.357 degrees Celsius higher than that of pure solvent. Calculate the molar mass of..
You can heat it with a charcoal fire. The heat of combustion of graphite (MW = 12 g/mol) is -393 kJ mol-1. How many grams of charcoal will have to burn to supply the heat
an atom of a certain element has 20 electrons write the ground state configuration of the element
titrated Acetic Acid with Sodium Hydroxide. The endpoint measured 27.9 mL. The NaOH concentration was figured out by titration of a primary standard KHP. The resulted concentration was ~.2651 M NaOH
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