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When a 3.00 g sample of KBr is dissolved in water in a calorimeter that has a total heat capacity of 1.36 kJ⋅K -1, the temperature decreases by 0.370 K.
Calculate the molar heat of solution of KBr.
Question- In an experiment on identifying cations using paper chromatography, the cation that most strongly absorbs on the stationary phase. Shows a color spot near the top of the chromatography paper after completion of the rise of the solution t..
In 1992 1/3 of the homes in Chicago was found to have a lead concentration of 10 ppb. If you lived in one of these homes and dranl 2 L of tap water a day, Explain what is the total mass of lead you have ingested per year
Problem- Draw the Lewis structures for calcium carbonate and magnesium hydroxide. Put charges on the individual atoms according to their formal charges. Ignore resonance. Include all nonbonding electrons.
Two patterns of packing different types of spheres are shown here. For each structure (a) draw the two-dimensional unit cell, determine the angle between the lattice vectors, g, and whether the lattice vectors are the same length or of different len..
You have gas! Well, you have a 450.0 mL sample of gas in a flexible container at 298.15 K. If you heat the gas to a temperature of 315.15 K
Question- Calculate the pH of a buffer solution of 0.35 M acetic acid and 0.20 M sodium acetate before and after 0.0030 moles of NaOH are added to 0.100 L of the buffer
What is the age of a rock whose Argon 40 / Potassium 40 ratio is 1.55? The half life of Potassium 40 is 1.28 x 10^9 years.
a mixture of 0.47 mole of H2 and 3.59 moles of HCl is heatedto 2800 degrees C. Calculate the equilibrium partial pressures of H2, Cl2,and HCl if the total pressure is 2.00 atm. For the reaction:
A 10.0 mL fraction of that solution is added to a 250 mL volumetric flask and diluted to the mark with 8-hydroxyquinoline solution to form a magnesium complex which precipitates
A 35.0-mL sample of HCl of unknown concentration is titrated to its end-point with 19.6 mL of 0.50 M NaOH. What is the molarity of the HCl?
Calculate the ph at the equivalence point for the titration of 1.0 m ethylamine by 1.0 m perchloric acid
1-If 10.7 mL of 0.105 M NaOH is required to reach the first equivalence point of a solution of 0.050 M citric acid, a triprotic acid, how many mL (total) of NaOH are required to completely titrate all three of citric acid's protons
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