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Predict what amount in grams this double replacement reaction when 40ml of Potassium Iodide Pb(NO3)2 (aq) + 20 ml of Lead(II) nitrate 2KI (aq) combine to make --> 2KNO3 (aq) + PbI2 (s) . What is the predicted amount of PbI2 (precipitation)?
The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione... better known as luminol, is used by forensic scientists in analyzing crime scenes for the presence of washed-away blood.
in a coffee-cup calorimeter 1.60 g of nh4no3 is mixed with 78.0 g of water at an initial temperature of 25.00degc.
how many grams of AgNO3 can be produced by reacting completely 88.0g of Ag? (c)- state the number of grams of water that can be obtained by the reaction of 324g of Ag with 126g of HNO3
calculate the approximate amount of sodium thiosulfate pentahydrate needed to prepare 500mL
Combustion analysis of toluene, a common organic solvent, gives 4.12mg of {\rm{CO}}_2 and 0.959mg of {\rm{H}}_2 {\rm{O}}. If the compound contains only carbon and hydrogen, what is its empirical formula
The work function, W, of magnesium metal is 5.90x10^-19 J. Calculate maximum wavelength of light required to release electrons from the metal.
Calculate the pH of 1.00 L of a buffer that is 0.140 M HNO2 and 0.180 M NaNO2. What is the pH of the same buffer after the addition of 1.00 mL of 12.0 M. HCl. (pKa of HNO2 = 3.40). What is the pH of the Original buffer and after HCl is added?
When the following reaction is balanced in basic solution using the lowest possible whole number coefficients, the coefficient of PbO2(s) will be: BrO3-(aq) + Pb(OH)42-(aq) --> Br-(aq) + PbO2(s)
the average number of collisions suffered by a single molecule of nitrogen in a second. (b) the total collision frequency Zbb in 1 / (cm^3 s).
You prepare a buffer solution by dissolving 1.77 g each of benzoic acid, HC7H5O2, and sodium benzoate, NaC7H5O2, in 900.0 mL of water.The pH of the buffer is 4.19. How much (in grams) of the buffer (benzoic acid), would you add to the 900.0 mL of ..
What would the absorbance readings be for the acid and base forms of methyl red indicator at the acid wavelength? At the base wavelength?
A solution was prepared to have a density of 1.20 g/mL and a molality of 2.24 m at 22oC. The Mm of the solute is 63.10 g/mol. (a) What is the molarity of the solution?
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