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You transferred 20. mL of acetic acid solution to an Erlenmeyer flask and added 2 drops of phenolphthalein solution. You filled your buret with 0.10 M NaOH so that the initial buret reading was 1.96 mL. After titrating your sample tothe faint-pink phenol-phthalein endpoint, the final buret reading was 17.50 mL.
What is the concentration of the acetic acid solution?
Find out the volume of a .750M K2Cr2O7 solution required to completely react with 5.10g Cu. The molecular mass of K2Cr2O7 is 294.185.
A 10.0 lb bag of 20:10:5 fertilizer is 20.0% nitrogen by weight. a) Calculate how many grams of nitrogen are contained in the bag. (I got 907 grams of Nitrogen)
Question- A compound is reacted with excess H2 with a platinum catalyst and forms 2, 4 dimethylhexane. When a new sample of the same compound is reacted with ozone at -78C followed by dimethylsulfide
a) Provide the corresponding mRNA sequence and label the 5' and 3' ends: b) What are the first 3 amino acids coded by this gene?
A 2.78 10-4 M solution of a compound has an absorbance of 0.451 at 520 nm in a 1.00 cm cell. The solvent's absorbance under the same conditions is 0.019. What is the molar absorptivity of the unknown compound
For a fair comparison, let the current source I = VDD/RD, which is the initial current available to charge the capacitor in the case of a resistive load. Find tPLH for each case, and hence the percentage reduction obtained when a current-source lo..
a 0.250 g quantity of an acid is titrated with 0.108 mnaoh. it takes 27.22 ml of naoh to reach the endpoint. what is
Explain what are the concentrations of HSO4-,SO42-, and H+ in a 0.20 M KHSO4 solution? H2SO4 is a strong acid, Ka forHSO-4 = 1.3x10-2) Compute the pH for each of these solutions: a) 0.10 MNH3, b) 0.050 M pyridine
State how much oxalate unknown should the student weigh out in order to use 35.0mL of permanganate solution?
for the reactionno o3 rarr no2 o2the second order rate constant has a value of 1.8x10-14 molecule-1 cm3 s-1 at
The students continued to do the experiment and determined the negative heat capacity of a metal and heats of reaction, using the negative heat capacity for the calorimeter.
In the experiment of Purcell and Pound, the maximum magnetic field strength was 0.63 T and the initial temperature was 300 K. Pretending that the lithium nuclei have only two possible spin states (in fact they have four), calculate the magnetizati..
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