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The molecular weight of an unknown gas was measured by an effusion experiment. It was found that it took 64 seconds for the gas to effuse, whereas nitrogen required 48 seconds. The molecular mass of the gas is ?
Write an essay about molecular modelling, its uses, and applications, and use a freely available modelling software from the internet and include the details of the modelling you followed, and give examples of at least three models you developed.
derive the clayperon equation. what is the primary use in phase diagrams? can you use it to justify the relative slopes
Which of the following statement correctly identifies three proteins that appear in the blood as a result of an occluded coronary artery that led to a myocardial infarction (MI)
the following standard gibbs energy of formation values in kJ/mol: CH4, 50.7; H2O, -228.6; CO2, -394.4 calculate the standard free energy change for the combustion of CH4
Nitrous oxide is a significant greenhouse gas. The global sink N2O is 12.6 Tg N yr-1. The mixing ratio is 559.5 micrograms/m3 as well as the lifetime of N2O is 128 years. Utilize an average surface pressure of 986 hPa to calculate mass of atmosphe..
Geologist can estimate the age of rocks by their uranium-238 content. The uranium is incorporated in the rock as it hardens and then decays with first-order kinetics and a half-life
The CO2 reacts with the CaO and BaO, forming CaCO3 and BaCO3.When the reaction is complete, the pressure of the remaining CO2 is 150 torr. Calculate the number of moles of CO2 that have reacted.
Does a chemical change occur when you cook an egg? Why or why not? When you fry an egg, it becomes a solid, the heat makes it smoke, and the color changes from clear and yellow to all yellow.
The pH of a solution of a weak acid is found to be 4.625. If 10.000 mL of this solution is titrated with 7.3990 mL of 0.012500 M NaoH, what is the Ka of this acid
Explain the number of moles present in H+, OH- and H2O in a reaction of 25ml of 1M HCL with 75ml of 1M NaOH
If the partial pressure of the cyclopropane in the mixture is 330 mm Hg and the partial pressure of the oxygen is 1.0 atm, what is the total pressure of the mixture in torr
Write the balanced net ionic equation for the following dissolution reaction: Zn(OH)2 in aqueous NaOH
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