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Dry ice is solid carbon dioxide. A 0.149 g sample of dry ice is placed in an evacuated 4.77 L vessel at 26.0 degree C. calculate the pressure inside the vessel after all the dry ice has been converted to CO2 gas
Write the molecular formula for a compound with the possible elements C, H, N & O that exhibits a molecular ion at M+=85.0894. Please show all steps, I have no idea how to do this problem, and I want to understand it for the exam.
Multiple choice questions in organic chemistry - Which of the following statements are true about the processes of melting and freezing?
calculate the pH of a solution formed by mixing 65 mL of .27 M NaHCO3 with 75 mL of .12 M Na2CO3
how much energy is lost by 10 kg of silver if it is cooled from 35 degree celsius to 21 degree celsius
A technician was accidentally exposed to potassium-42 while doing some brain scans for possible tumors. the error was not discovered until 48h later when the activity of the potassium-42 sample was 2.1?ci .if potassium-42 has a half-life of 12 h
The inversion of compound B is experimentally determined to follow the rate law: d[B]/dt = -k[B]a[H+]b. At 25 °C and a constant pH of 3.00, the reaction proceeds with a constant half-life of 40.0 min. At this same temperature, but at a constant pH..
The insecticide DDT has a half-life in the human body of about 7 years. That is, in 7 years its concentration.( Although DDT is no longer in use in the United States).
When comparing the successive ionization energies of an element, an unusually big increase in ionization energy is seen when
a certain amount of chlorine gas was placed inside a cylinder with a movable piston at one end. the initial volume was
Combustion of a 5.50 g sample of a compound containing only C and H produces 18.59 g of CO2 and 3.81 g of H2O. In another experiment, the molar mass of the compund was found to be 78g/mol. Determine the Empirical and molecular formulas for this co..
Hexane and cyclohexane for an ideal solution. the vapor pressure of hexane is 151 torr and that of cyclohexane is 98 torr at 25C. calculate the vapor pressure of each of the following solutions and teh mole fraction of each of teh substance in the..
For each of the following unbalanced equations, indicate how many moles of the second reactant would be required to react exactly with 0.275 mol of the first reactant. Show all work below.
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