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olid benzoic acid, C6H5COOH(s), is often used to determine the heat capacity of a bomb calorimeter, because the constant volume heat of combustion of this compound is known with high precision: qV = 26.434 kJ/g. When a 2.088 g sample of C6H5COOH(s) was burned in a particular bomb calorimeter, the temperature increased by 11.77 oC. In a second experiment, a 1.217 g sample of a compound with the formula C6H14O(l) was burned in the same calorimeter.
The temperature increased by 10.08 oC. Use these data, plus the information given below for CO2 and H2O, to estimate the standard enthalpy of formation, of H, at 25 oC for this compound of H values at 25 oC for CO2(g) and H2O(l) are 394 kJ mol-1 and 286 kJ mol-
A 10.9-g mixture of nitrogen and carbon dioxide is found to occupy a volume of 8.88 L when measured at 641.9 mmHg and 28.5oC. What is the mole fraction of nitrogen in this mixture?
3.00×10-3 mol of HBr is dissolved in water to make 17.0 L of solution. What is the concentration of hydroxide ions, OH-, in this solution?
What is the molarity of a NaOH solution if 28.2 mL of a 0.112 M H2SO4 solution is required to neutralize a 25.0-mL sample of the NaOH solution?
Which best describes a solid?
Concrete used in road construction is reinforced using steel bars in a grid, known collectively as "rebar." After many years, rebar will begin to corrode, and the concrete will weaken.
Assuming the diver took a deep breath (6.0L in her lungs)at 1.0 atm just before entering the water, what will be the volume of air in her lungs when she gets to 10 feet of depth? She does not exhale while descending.
As food manufacturers add vinegar to food preparations to make them tart, rather than pure acetic acid,
What is the concentration of protein A in the filtrate, as well as the concentrations of proteins B and C in the filtrate and retentate?
All of the following are factors that affect reaction rate EXCEPT a. density of reactants b. presence of a catalyst
A 25.00mL portion of 0.00923M NaOH (MM 40.00g/mol) was introduced into the solution of H2SO4 (MM 98.08g/mol), then the excess was back titrated with 13.33mL of 0.01007M HCl (MM 36.46g/mol). Calculate the parts per million of sulfur in the sample.
Since it is only slightly soluble, assume that the volume of the solution does not change on dissolution, and calculate the solubility product. Solubility of InF3: 4.0 x 10-2 g/100. mL
When we extrapolate concentration dependent values to zero solute concentration, what do these extrapolated values mean physically
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