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Protein X contains 16.78% nitrogen. A 0.4100 mL aliquot of protein X solution was digested, and the liberated NH3 was distilled into 10.00 mL of 0.02260 M HCl. Unreacted HCl required 3.07 mL of 0.01960 M NaOH for complete titration. Find the concentration of pretion in the originial sample.
How many grams of sodium lactate should be added to 1.00 L of 0.150 lactic acid ( or ) to form a buffer solution with = 4.10? Assume that no volume change occurs when the sodium lactate is added.
What is the maximum concentration (in M) of chloride ions in the solution that contains 0100 M Pb2 +? The Ksp for lead (II) chloride is 1.0 x 10-4.
What would happen if you increase the pH of this acidic solution by addition of a strong base such as KOH? b.) Write the balanced equation for the reaction (a.) and identify both the stronger acid and base and the weaker acid and base.
The decomposition of urea in 0.1 M HCl is first order in urea and first order overall. When [urea] = 0.200 M , the rate at 61.0 °C is 8.56 x 10-5 M/s. What is the concentration of urea in this solution after 4751 s if the starting concentration is..
When chlorine reacts with 2-methylpropane and replaces only one hydrogen with chlorine
You are given 5.00 mL of an H2SO4 solution of unknown concentration. You divide the 5.00-mL sample into five 1.00-mL samples and titrate each separately with 0.1000 M NaOH.
If an insufficient amount of liquid unknown had been used, how would this have affected the value of the experimental molar mass?
A hot tub is filled with 480 gallons of water, which has a density of 1.0 {rm g/mL}. What is the volume of water in the tub, in liters?
What is the heat change in J associated with 65 g of gaseous acetic acid at 127 oC changing to solid at -50 oC? c(acetic acid) (g) = 1.11 J/(g.K) c(acetic acid) (liq) = 2.18 J/(g.K) c(acetic acid) (s) = 1.32 J/ (g.K) ?Hfus(acetic acid) = 192 J/g ?..
In a reaction 8200 g of sodium reacts with 74.00 g of ferric oxide to form sodium oxide and iron metal. Calculate the mass of sodium iron produced.
Calculate the percent manganese in the sample as Mn3O4 (only part or none of the manganese may exist in this form, but we can make the calculations on the assumption that it does)
Titration of sodium carbonate with HCl to the methyl orange end point involves the reaction of 1 mole of Na2CO3 with 2 moles of HCl. Write the balanced chemical equation in a.
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