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An 18-karat gold necklace is 75% gold by mass, 16% silver, and 9.0% copper. How many grams of copper are in the necklace? If 18-karat gold has a density of 15.5 , what is the volume in cubic centimeters?
What is the most likely chemical explanation for the fact that butter is a solid at room temperature while olive oil is a liquid?
Toxic cyanide ions can be removed from wastewater by adding hypochlorite: 2CN-(aq)+5OCl-(aq)+H2O(l) --> N2(g)+2HCO3-(aq)+5Cl-(aq) How many liters of 0.125M OCl- are required to remove the CN- in 3.4X10^6L of wastewater in which the CN- conentratio..
The equilibrium constant for the elctrochemical reaction 2Fe+Cu3(PO4)2 = 2FePO4 + 3Cu occuring in aqueous solution
Hydrogenation of a monounsaturated fatty acid yields a saturated fatty acid. Oleic acid is a monounsaturated fatty acid. Predict the product of its hydrogenation:
What observed rotation is expected when a 1.62 M solution of (R)-2-butanol is mixed with an equal volume of a 0.810 M solution of racemic 2-butanol, and the resulting solution is analyzed in a sample container that is 1 dm long
Integrate the expression b = 1/V (derivative of V / derivative of T) at constant pressure, assuming that b is independent of temperature. By doing so, obtain an expression for V as a function of T and b at constant P. b means beta
What is the pH of the final solution mixture? KA1=6.2x10^7 KA2=4.4x-^-11
An acid solution is 0.100 M in HCl and 0.190 M in H2SO4.What volume of a 0.150 M KOH solution would have to be added to 550.0 mL of the acidic solution to neutralize completely all of the acid?
Volume of NaOH dispensed (mL) A) 2 ml B) 2.25 ml C)2.25 ml. Moles of NaOH dispensed. Molar concentration of the acid (moles/L)
The reaction of methane and water is a way to prepare hydrogen according to CH4 (g) + H2O = Co2 (g) + H2 (g) a) If 995 g of CH4 reacts with 2510 g of water, how many moles of reactants and products are there when the reaction is finished
You have samples of approximately 8mL solution with ph ranging from 4 to 10. Calculate the volume of 1M HCIO4 needed to lower the ph to 2.5.
At pH 12, magnesium hydroxide is insoluble and does not react with EDTA. The titration of a hard water sample at pH 12 thus yields results for calcium only. A 250.0-mL sample of tap water was adjusted to pH 12 and titrated with 0.01056 EDTA using ..
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