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A white solid dissolves in water to form a neutral solution. No precipitate forms when this olution is treated with a solution of NH4CL/NH3 buffer, nor when (NH4)2S is added. When the solution is acidified with HC2H3O2 and K2CrO4 is added, a yellow precipitate forms. This precipitate dissolves upon addition of concentrated HCL. Acidification of a solution of the solid with HNO3 followed by addition of AgNO3 causes formation of a white precipitate. What is the identity of the original solid?
What would the potential of a standard hydrogen (S.H.E.) electrode be if it was under the following conditions?
What is the molality of a solution that contains 2.93 grams of urea (molar mass = 60.0 g/mol) in 141 grams of benzene.
What mass of glucose can be produced from a photosynthesis reaction 6CO2(g) + 6H2O -> C6H12O6(aq) + 6O2(g) that occurs using 18.4 mol CO2? Answer in units of g.
sample of MgO was dissolved in 85.00g of 1 M HCl assume that no heat was absorbed by the walls of the calorimeter and the specific heat of the hydrochloric acid solution is 3.64
Due to decay of ^40K, cow's milk has a specific activity of about 6x10^-11 mCi per milliliter. How many disintegrations of ^40K nuclei are there per minute in 1.0 qt of milk
You titrated 1.740g of a solid unknown acid that wasdissolved in 100.0 mL of distilled water; the initial pH value was 2.5. You found that pH= pKa =4.2 when 12.50 mL of NaOH had been added. The concentration of the sodium hydroxide was 0.500M. Cal..
What is the heat change in J associated with 73 g of solid butane at -147 C changing to liquid at -109 oC?
Use the molar volume of a gas at STP to calculate the density (in g/L ) of carbon monoxide gas at STP.
The density of the gas doesn't change The temperature of the gas increases The temperature of the gas decreases The mass of the gas decrease
A 5.00-L reaction vessel contains hydrogen at a partial pressure of 0.588 atm and oxygen gas at a partial pressure of 0.302 atm. Which element is the limiting reactant in the following reaction? 2H2(g) + O2 (g) -> 2H2O(g)
Given the equation HCl + NaOH--> H2O + Na+ Cl-, how many moles of water are produced in this reaction. Additional info: .500M HCl used, .500 M NaOH used, and delta H^0 is known to be -57.86 kJ/mol water formed
What are five general properties of aqueous acids? Name some common substances that have one or more of these properties.
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