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What do you notice about the element Technetium (Tc) compared to the other elements around it? You see the same thing as some of the very heavy elements, like many beyond Element 84, Polonium (Po). What does this way of writing atomic weights mean? What does this imply about Tc?
2.9 mol Fe(OH)3 and 7.7 mol H2SO4 react according to the equation 2 Fe(OH)3 + 3H2SO4 ->Fe2(SO4)3 + 6H2O. If the limiting reactant is Fe(OH)3, calculate the amount of Fe2(SO4)3 formed.
How many coulombs are required?
An amphoteric compound exhibits a. acidic properties b. acidic and basic properties c. metallic properties d
What is the theoretical yield in grams? What is the theoretical yield in moles? (I already have the calculated amounts of reactants) Just need theoretical yields.
The average concentration of calcium ion in seawater is 412 mg of calcium ion per kg of seawater. What is the molarity of the calcium ion if the density of the seawater is 1.025 g/mL?
Assume that a waste contains 395.0 mg/L of biodegradable CH2O and is processed through a 190000.0 L/day sewage treatment plant which converts 40% of the waste to CO2 and H2O.
The atmospheric pressure in La Grande (683 atmospheric pressure) is significantly lower than that of Portland (760 normal pressure). How would the boiling points of a liquid compare in these two locations? Why?
Standardization of Na2S2O3, Added 0.12 g KIO3 and dissolved in 75 mL of distilled water. Added .20 g of KI to solution, then added 10 mL of 1M HCl and immediately titrated with thiosulfate solution (made by weighed 25 g of Na2S2O3-5H20
Show your calculations and determine the half-life of Tc-99 (in hours). (b)The delivery of a sample of Tc-99 from the reactor to the nuclear medicine lab of the hospital takes 3h.
In a Titration 33.21 mL 0.3020M rubidium hydroxide solution is required to exactly neutralize 20.00mL hydrofluoric acid solution. What is the molarity of the hydrofluoric acid solution?
An environmental chemist needs a carbonate buffer of pH 10.00 to study the effects of acid rain on limestonerich soils. How many grams of Na2CO3 must she add to 1.5 L of freshly prepared 0.20 M NaHCO3 to make the buffer? KA of HCO3- is 4.7 x 10-1..
starting with toluene as the only organic starting material and utilizing an organocopper coupling method
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