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A. Calculate the molarity of a solution by dissolving 0.710 grams of Na2SO4 in enough water to form exactly 900 mL of solution
B. How many moles of KMnO4 are present in 300 mL of a 4.40X 10to the -2 m solution
C How many milliliters of 120 M HCl solution are needed to obtain 0>240 mol of HCl
What is the sum of the charges on alanine, aspartic acid, and lysine? Describe how you could use salt solutions that contain cations to control the interaction between the stationary phase and the amino acids
Calculate the mass in grams for a sample of Al that absorbs 1.70kJ when the temperature increases from 56 degree Celsius to 177 degree Celsius?
It then gives off a photon having a wavelength of 4.10 × 102 nm. What is the final state of the hydrogen atom? Values for physical constants can be found here.
Write the formula for the ionic compunds formed between Co+2 and the simple ions formed by 1) cabon, 2)nitrogen, 3) oxygen and 4)fluorine.
The density of copper is 8.92 g/cm3 and the density o zinc is 7.14 g/cm3. Assume that the density of the brass varies linearly with composition.
What is the energy per photon of the lowest frequency of electromagnetic radiation that can be used to observe a gold atom with a diameter of 280 picometers.
a mixture of n2 o2 and co2 has a total pressure of 791. torr. in this mixture the partial pressure of n2 is 115. torr
moles of an ideal gas at 300K are expanded isothermally from an initial P of 4 atm to a final P of 1 atm. Calculate q, w, DeltaU, DeltaH for the process.
Standard reduction potentials are given on the next page. (a) Draw a diagram of the electrochemical cell, labeling all electrodes and solutions. (b) What is the pH in the Pt | H+ | H2 half-cell? (c) What is the value of the equilibrium constant fo..
at 298k 125 ml of 0.60 m potassium hydroxide koh is added to 175 ml of 0.40 m hydrochloric acid hcl. what is the final
Fractional distillation was applied to separate a mixture of water and methanol. The same method was also applied to separate a mixture of carbon tetrachloride and toluene, using the same fractionating apparatus
the pressure of a sample of a 1000 mL sample of gas at 10.0C increases from 700 mm Hg to 900 mm Hg. If the volume is unchanged, what is the new temperature
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