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A sample which is having of calcium hydroxide was dissolved in the 250.0 ml of water. It was found that 14.80 mL of this solution was required to reach the stoichiometric point in a titration of 28
A sample which is having 16.20-mL of sodium hydroxide solution is titrated to the stoichiometric point with the 18.60 mL of a 0.262 M solution of HNO3. Find out the molarity of the sample of sodium
At STP a balloon filled with 1.00 mole of helium gas is heated to 298 K at constant pressure. Determine the change in internal energy. Where CHe = 5.20 J/g oC
When 3.00 g of propane, C3H8, is burned in a bomb calorimeter whose heat capacity is 32.7 kJ/K, the temperature increases by 4.62 Kelvin's? Propane is used as a home fuel in some areas. &nb
Determine what approximate ratio of acid and salt is needed, to make the pH 8.8 of a boric acid-sodium borate buffer solution , where pKa of borate acid is 9.24
What would be the maximum buffer capacity of this buffer at what pH would bmax occur when the pKa for boric acid is 6.10 Assuming that the total bicarbonate buffer concentration in normal blood
A sample which is having 1.80-g of the mixture is dissolved in water, and an excess of NaOH is added, forming a precipitate of Al(OH)3. A mixture contains only NaCl and Al2(SO4)3.
Describe what quantity of energy is released to the surroundings in joules, if 2.00 mL of mercury is cooled from the 23.0°C to -38.8°C and then frozen to a solid? The freezing point of mercu
Determine the numbers of grams of Cadmium are deposited from an aqueous solution of Cadmium Sulfate when the electric current of 1.51 Amperes flows for 156 minutes?
Determine the disintegration rate of the bones during the "dating" which is based on the Carbon 14? State this activity in disintegrations per minute per gram.
Explain in brief how are benzhydrol, biphenyl and benzophenone order in terms of increasing polarity (lowest polar to highest polar)?
Determine the number of grams of excess reagent remaining when 17.3 grams of H2SO4 is reacted with the 37.3 grams of NaOH in the reaction: H2SO4 + 2 NaOH---> 2H2O + Na2SO4
The standard heat of reaction, for the reaction as written, is-114.1 kJ; it is exothermic. The reaction is 2 NO(g) +O2 (g) => 2 NO2 (g) Nitrogen monoxide reacts with the oxygen gas to giv
Briefly describe how you could use the TLC to decide when the reaction was complete. Suppose you prepared benzhydrol by the reduction of benzophenone with the sodium borohydride.
The optic nerve requires a minimum of 2.0 * 10^-17 J of energy to trigger a series of impulses that eventually reach the brain. The human eye is a complex sensing device for the visible light.
Calculate the enthalpy of reaction per mole of CsOH? Suppose the densities of the solutions are all 1.00 g/mL and the specific heats of the solutions are 4.2 J/g*K.
A sample which is having 25.00 mL of 0.100 M CH3CO2H is titrated with the 0.100 M NaOH. Determine the pH of the solution at the points where the 24.5 and 25.5 mL of NaOH have been added. (Ka = 1.8
Determine the heat of decomposition for this process at constant pressure and 25°C. (Look up the standard enthalpy of formation of the reactant and products in the table:
Explain is it possible for a native protein to be entirely devoid of α-helices or β-sheets, or other repetitive secondary structures? Discuss in detail.
Determine the percent yield if 35.7 grams of C4H8Br2 are formed when 10.0 grams of C4H8 are reacted with excess Br2. The reaction isC4H8 + Br2---> C4H8Br2
Determine the difference in slope of the chemical potential against the pressure on either side of , determine the normal freezing point of water and the normal boiling point of water.
Determine the heat capacity of this calorimeter when using a different calorimeter, and mixing the 50mL of hot water at 65degree C with 60 mL of water in the calorimeter at 25degree C, the
Calculate the heat of reaction in terms of kcal/mole of AgNO3? In the reaction shown below, 699 kcal of heat are liberated when the 2.10g of AgNO3 reacts with HCl: AgNO3(aq) +HCl(aq) ---> AgCl
Determine the number of moles of H2O produced if the reaction goes to completion. Consider the reaction between 50.0 mL of liquid methanol (CH3OH; density = 0.850 g/mL) and 22.8 L of O2 at 27°
Determine the numbers of moles of 2-propanone did you use? Suppose you used 8.14×10-2 g of2-propanone and 0.10 g of DNPH where MW = 198 g/mol.