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Suppose that 0.2553 moles of KMnO4 were required to exactly titrate the Fe2+ in a sample. How many moles of Fe2+ were in the sample?
Calculate the pH of each of the following solutions.
95% wt solution of ethanol in water has density of 0.804gm/mL. Find mass of 1.00L of this solution and the number of grams of ethanol per litre ?
Working with partition function and entropy what is the ratio of the number of particles in the J= 14 to the J=4 level at a temperature of 1900 K?
The excess EDTA was then back-titrated, requiring 5.00 mL of 0.050 0 M Zn2. What was the concentration of Ni2 in the original solution?
Atrazine is an herbicide widely used for corn and is a common groundwater pollutant in the corn-producing regions of the United States. The log Kow for atrazine is 2.65.
What products would expect from acid-catalyzed hydration of the following alkenes?
A 0.0355 g sample of an unknown molecular compound is dissolved in 1.000 g of liquid camphor at 200.0°C. Upon cooling, the camphor freezes at 157.7°C. Calculate the molar mass of the unknown compound.
which element has the greatest density at STP? and why?
Identify all of the substances that are used or produced in this experiment A5. Distinguish between elements and compounds.
By what factor (how many times) will the rate constant increase when the temperature is raised from 10°C to 28°C?
How many carbon atoms does the sample contain?
What is the initial sulfur dioxide concentration (in mol/L or M)?
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