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How to find the pH of a solution that is 4.2 x 10^-2 M in HClO4, and 4.9 x 10^-2 M in HCl? and.... a solution that is 1.03% HCl by mass (1.01g/mL is the density of the solution)
At constant temperature and volume, 3.8?10-3 mol of helium is added to a 1.0 L sample of xenon at 0.081 atm and 325 K. What is the total pressure of the gas mixture
If you use a liter ( 1000mL) bottle of oil in your engine, how much heat is produced in kcal? In BTU? The density of motor oil is .82g/mL
which of the following are oxidation reduction reactions? a)Ca(s)+F2(g)>CaF2(s) b)Fe(s)+2HCl(aq)>FeCl2(aq)+H2(g) c)2NaCl(aq)+Pb(NO3)2(aq)>PbCl2(s)+2NaNO3(aq) d)2CuCl(aq)>Cu(s)+CuCl2(aq)
When X-rays with a wavelength of 154 pm (pm = 10^-12 m) are diffracted from an unknown crystalline compound, the first reflection occurs at theta= 4.24 What distance does that correspond to? (assume n =1)
What are the poles of the following transfer functions?
a gas has a volume of 2.57L, a pressure of 1.54 atm, and a temperature of 24.5 C. calculate the number of moles of gas present.
Treatment with cyanogen bromide, which cleaves at M, resulted in two fragments: a pentapeptide containing two K residues and a tripeptide containing V, G, and A. (The residues are not listed in any particular order.)
Vitamin C, Molar mass 176.12 g/mol, is a compound of C, H, and O, and found in many natural sources, especially citrus fruits. When 1.000 g sample of vitamin C is burned in a combustion apparatus, the following data are obtained
A piece of iron weighing 85.690 g was burned in air. the mass of the iron oxide produced was 118.350 g. What are the moles of iron in the original sample
What happens to the amount of ionisation as we increase the ionic strength of a solution? What happens to the solubility of a salt and what is meant by the various terms we use when discussing analytical techniques?
what is the final temperature of A metal sample weighing 34.526 g was heated to 98.0 degrees Celcius then quickly transferred into a styrofoam cup calorimeter containing 74.365 g of distilled water at a temperature of 27.0 degrees celcius.
Assuming that all the other quantum numbers can take only the values possible in our world and that the Pauli esclusion principle applies, give the following.
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