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A student was asked to identify an unknown hydrate by following the procedure described in this module. After heating and cooling, a 2.752-g sample of this unknown weighed 1.941 g. Students were given a list of possible compounds from which to identify their unknowns: LiNO3 . 3 H20, Ca(NO3)2 . 4 H2O, and Sr(NO3)2 . 4 H2O.a) Calculate percent water in the students unknown.b) Could the unknown possibly have been Sr(NO3)2 . 4 H2O? Briefly explain.c) What is the probable identity of the students unknown?d) Based on the students results and your answer to (c), what is the most probable source of error in the experiment? A student was asked to identify an unknow hydrate by following the procedure described in this module. After heating and cooling, a 2.752-g sample of this unknow weighed 1.941 g. Students were given a list of possible compounds from which to identify their unknowns: LiNO3 . 3 H20, Ca(NO3)2 . 4 H2O, and Sr(NO3)2 . 4 H2O.
a) Calculate percent water in the students unknown.b) Could the unknown possibly have been Sr(NO3)2 . 4 H2O? Brieflyexplain.c) What is the probable idenity of the students unknown?d) Based on the students results and your answer to (c), what is themost probable source of error in the experiment?
We are asked to explain the pH and how to find hydrogen ion concentration - Find the pH of an acidic substance of your choice.
estimate the mean ionic activity coefficient for nacl in a solution that is 0.020 molkg naclaq and 0.035 molkg cano32
a solution was prepared by dissolving 28.0g of kcl in 225g of water. calculate the mass percent of kcl in the
Acid catalyzed hydration of 3-hexene gives only one alcohol with the molecular formula C6H14O. A) Draw the structure of 3-hexene.
at 25 degrees Celsius, the vapor pressure of water is 23.8 torr. What is the vapor pressure of a solution prepared by dissolving 65 grams of glucose in 150 grams of water?
Lewis Structure for a Nitrate Ion (NO3-1). Assign the formal charge for the central atom, Nitrogen. What is that formal charge
Determine the pH at the equivalence (stoichiometric) point in the titration of 31.4 mL of 0.899 M HF by 0.886 M NaOH. The Ka of HF is 3.5 x 10^-4.
Calculate kp given that the initial pressures of nitrogen are 95 atm and 80 atm, respectively, and the equilibrium pressure of nitrogen oxide is 6.0 atm. I know the answer is 5.1x10^-3. I am trying to find how is that number possible.
The solubility product constant of Sr(IO3)2 is 1.14 × 10?7. What volume of 0.0485 M S2O32 is required to titrate a 15.0 mL sample of a saturated solution Sr(IO3)2
Determine the minimum concentration of the precipitating agent on the right to cause precipitation of the cation from the solution on the left.
To identify a diatomic gas (X2), a researcher carried out the following experiement. She weighed an empty 4.2L bulb, then filled it with the gas at 1.30atm and 23.0C and weighted it again. The difference in mass was 6.3 g. Identify the gas
What mass of glucose can be produced from a photosynthesis reaction 6CO2(g) + 6H2O -> C6H12O6(aq) + 6O2(g) that occurs using 18.4 mol CO2? Answer in units of g.
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