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The molar heat capacity at constant pressure of carbon dioxide is 29.14 J/mol K What is the value of its molar heat capacity at constant volume? Calculate the change in molar enthalpy and molar internal energy when carbon dioxide is heated from 15 degrees Celsius to 37 degrees Celsius?
Why shouldn't you use a sample that has been melted andresolidified to confirm a melting point? e) A sample of an unknown compound has an melting point of145-154C. What conclusions would you draw? What actions would youtake?
How many moles of hydrogen are present in a 26.3 mL sample at 19 degrees celsius and 744 torr?
How many grams of CaCO3 are produced when you react 55.2 mL of 0.150 M Ca(NO3)2 with 0.655 grams of Na2Co3?
At a given temperature,0.0500 mol NO, 0.200 mol Cl2, and 0.550 mol CINO were placed into a 1.00 L container. The equilibrium below was established and 0.250 mol of CINO is present. Determine the equilibruim constant (Kc).
A buffer solution is prepared by mixing 50.0mL of 0.300 M NH3(aq) with 50.0mL of 0.300 M NH4Cl(aq). The pKb of NH3 is 4.74. NH3 + H20 ----> NH4+ + OH-
The atmospheric activity of 14 C is 15 cpm/gC (counts per minute per gram of carbon). Assume that the cloth was made in the year 24 B.C. The half-life of 14 C is 5730 years. What will be the expected activity of 14 C of this sample
Ethylene glycol, antifreeze, has a density of 1.11 g/cm^3.a. What is the mass, in grams, of 410 mL of ethylene glycol?
Two liters of a buffered solution are created from .55 M HC3H5O3 (Ka= 1.3 E-4) and .45 M NaC3H5O3. what is the pH of the solution?
Calculating the concentration of the acetate ion when dissociation of acetic acid occurs in water and over varying pH conditions?
How many grams of magnesium chloride could be formed from the reaction of 6.82 g of magnesium with excess HCl?
if 25.0 mL of 0.125 M HCl is neutralized by exactly 14.8 mL of NaOH, what is the concentration of the base?
Calculate the mass of urea that should be dissolved in 201 g of water at 35°C to produce a solution with a vapor pressure of 37.1 mmHg.
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