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A 0.995g unknown mixture containing calcuim chloride reacts to give 0.505g ppt of calcium phosphate. what is the mass of calcium chloride in the unknown mixture knowing mass of beaker and unknown,105.020g and mass of beaker,104.025g and mass of ca3(po4)2ppt.
You have a sample of bone collected from Nevada and you find that it contains strontium-90 and exhibits an activity of 2.5 Bq. How much strontium-90 was present in the bone when the animal died 45 years ago?(The half-life of 90Sr is 29 years.)
Find the conditional formation constant for Ca(EDTA)2- at pH 9.00, where log Kf is 10.65 and ?Y4- is 0.041.
1 mole of monoatomic ideal gas is initially at T=300K, V=10L. Calculate w, q, deltaU, deltaH, deltaS, and delta S(surr) when the gas is expanding adiabatically against a constant external pressure p(ex) = 1 bar to a final volume of 20 L.
Reactant: water and 2.51 g of SbCl3 Product: 1.906 g of a solid of antimony, oxygen and chlorine, and 0.802 g of a single gas that is 97.20% chlorine and 2.75% hydrogen What is the empirical formula of the gas and the solid
Draw the structure(s) of the secondary alcohols with the chemical formula C6H14O that have a 4-carbon chain.
What must be the reaction temperature if a rate of 1.000 x 10^-9 M/s is required and [C] must be kept at 0.03000M. What must be the value of k to achieve the necessary rate?
Determine the theoretical and percent yield of your product. In the IR spectrum of phenacetin which peaks are due to the following vibrations: (list the wavenumbers)
Describe the differences in the shapes of the electron density distributions for NH3, NCl3, and PF3. Explain how the energy minimized bond angles
Ascorbic acid is a diprotic acid Ka1=8.0*10^-5 and Ka2= 1.6*10^-12. What is the pH of a .260 M solution of ascorbic acid
what are some examples of biomolecules that are detected by studying their activities
the solubility reaction of interest in this solution? (b) Is a precipitate expected in the solution (Yes, No, or Not Enough Information to Know)?
Sodium chlorate,NaClO3, decomposes when heated to yield sodium chloride and oxygen, a reaction used to provide oxygen for the emergency breathing masks in many airliners
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