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A piece of metal with a mass of 125g is placed into a graduated cylinder that contains 25.00mL of water, raising the water level to 56.00mL What is the density of the metal.
At a certain temperature, 4.0 mol NH3 is introducted into a2.0 L container, and the NH3 partially dissociates by the reactions:
An unknown metal M was converted to the sulfate,M2(SO4)3. A solution of this metalsulfate was treated with excess barium chloride solution to give abarium sulfate precipitate.
How many grams of potassium chloride(KCl) are needed to prepare.750 L of a 1.50 M solution of potassium chloride in water?
How many different values of the principle quantum number can be found in the ground state electron configuration of nickel?
Describe three different ways you could make an aceticacid/acetate buffer with acetic acid, sodium acetate, deionizedwater, a solution of hydrochloric acid, and a solution of sodiumhydroxide.
How many moles of Ba(OH)2 are required to make 1.0L of solution in which the OH- concentration is 0.050M??Barium Hydroxidedissolves as follows:
Briefly explain the behavior that distinguishes substancesthat we call eletrolytes from non-electrolytes. Also discuss thedifference(s) in behavior between a strong electronlyte and a weak electroly
In order to get maximum calorific output, a burner should have anoptimum fuel to oxygen ratio which corresponds to 3 times as muchoxygen as is required theoritically for complete combustion of the f
Consider the normal freezing point of water. What are the signs(positive or negative) of ΔS and ΔH for the freezing of liquid water to form iceand what is the ratio of ΔH/ΔS
The following reaction takes place in a sealed 5.0 L flaskheld at 450 K. If both reactants begin at partial pressuresof 5.0 atm, what will the final partial pressure of CO2 be assuming that the reac
Sulfur 2.56g is burned at a constant volume calorimeter with excessO2 gas. The temperature increases from 21.25C to 26.72C. Thebomb has a heat capacity of 923J/K and the calorimeter contains 815gram
Write equations for the preparation of the grignard reagent fromalkyl halide and for the reaction between the grignard reagent andthe carbonyl compound.
Consider a single d-electron in a homogeneous magnetic field.Calculate the angles which the respective angular momentum canadopt with respect to the direction of the magnetic field.
A student weighs an aspirin tablet and finds that it weighs 385 mg. She crushes it, dissolves it, and titrates it with 0.0500 M NaOH solution. The volume required to reach the endpoint is 29.97 mL
The formulas for the solutes are as follows: Sucrose(C12H22O11), Sodium Chloride(NaCl), Calcium Chloride (CaCl2) and Potassium Chloride(KCl).
69.7g of a solute with a molecular mass of 2790g are dissolved inenough water to make 1.00dm3 of a solution at 20degrees celcius. What is the osmotic pressure of the solution?
How many grams per liter of sodium acetate would need to be dissolved to produce a pH of 8.00 in a hydrolosis reaction between the acetate ion and water?
Oxalic acid(C2H2O4) is generally used as ableaching and cleansing agent. Calculate concentration of all thespecies present at equilibrium in a 0.10M solution.
If you heat 100g of calcium carbonate what mass of carbondioxide should be produced? If you only collect 38.5 g of carbondioxide gas, what is the percent yield of your reaction?
In a 100 ml sample of a buffer solution, the propanic acidconcentration is 0.50 molar and the sodium propanoate concentrationis .50 molar. To this buffer solution, 0.0040 mole of solidNaOH is added.
How could the addition of a non-solvent species not participatingin equilibrium indirectly affect the position of that equilibrium?
What is ?H° of the reaction done experimentally usingfurfuryl alcohol, anhydrous carbon tetrachloride andtriphenyl phosphine to form furfuryl chloride? Is the reaction endothermic or exothermic
Consider the following observation: A rubber band isstretched under tension (at least 0.5 cm wide) and then touched tothe upper lip and found to be warm.
A 16 ounce speciality coffee drink contains 254 mg caffeine. If all the caffeine is extracted and dissolved in an equal amount ofwater, what is the pH of the solution?