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1. A given amount of molecular oxygen gas is in a closed, expandable container. Assuming that the molecular oxygen acts as an ideal gas, answer the following questions.
a. What will happen to the volume if the temperature doubles and the pressure remains constant?
b. What will happen to the pressure if the volume is decreased by half and the temperature is doubled?
2. A sample of molecular nitrogen gas, N2, occupies 3.0 L at a pressure of 3.0 atm. What volume will it occupy when the pressure is changed to 0.50 atm and the temperature remains constant?
3. A 325 mL sample of air at 0.95 atm and 30.0oC, occupies what volume at 1.05 atm and 75.0 oC?
4. Molecular hydrogen gas was collected over water in a eudiometer at 25.0°C when the atmospheric pressure was 752 mm Hg. What was the pressure of the molecular hydrogen gas? (Water vapor pressure at 25.0°C is 23.756 mmHg)
1. Consider the structure of caffeine (re-draw it here), and answer the following questions from a structural perspective.
Consider the titration of 25.0 mL or 0.010 M Sn^2+ by 0.050 M TI^3+ in 1 M HCL, using pt and saturated calomel electrodes to find the endpoint.
How many grams of magnesium chloride could be formed from the reaction of 6.82 g of magnesium with excess HCl?
calculate the osmotic pressure associated with 50.0 g of an enzyme of molecular weight 98,000 g/mole dissolved in 2600 mL
Nitrogen forms several gaseous oxides. One of them has a density of 0.869 g L-1 measured at 764 mmHg and 150°C. Write the formula of the compound.
An aqueous solution of KI has a freezing point of -1.95 C and an osmotic pressure of 27.0 atm at 25.0 C. Assuming that the KI completely dissociates in water, what is the density of the solution
The initial pressure in the piston is 101 kpa. Find out the heat that must be extracted to cool the gas from 375C to 275C A) At constant pressure B) at constant volume
Explain some of the challenges that the enterprise encountered during strategy implementation and how they did or might overcome these challenges.
A voltaic cell is prepared in which aluminum metal is oxidized to Al3+, and nickel(II) is reduced to nickel metal. Which of the following represents the correctly balanced equation for this reaction
What are the major species present in 0.250 M solution of each of the following acids. Calculate the pH of each of these solutions.
Given a vapor pressure of toluene of 21 mm Hg, at 760 mm Hg, what is the equilibrium concentration for toluene
Explain a solution of 1.00 g of anhydrous aluminum chloride AlCl3 in 50.0 g of water is found to have a freezing point of -1.11 degrees Celsius. Define Kf (H20) = 1.86 degrees Celsius/m.
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