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1) A piece of dry ice (CO2) has a mass of 23.50 g. It is dropped into an evacuated 2.00-L flask. What is the pressure in the flask at -7°C?
2)A sample of oxygen of mass 22.0 g is confined in a vessel at 2°C and 2000. torr. Then 2.50 g of hydrogen is pumped into the vessel at constant temperature. What will be the final pressure in the vessel (assuming only mixing with no reaction)?
3)A nitrogen sample occupies 236 mL at STP. If the same sample were collected over water at 25°C and 700. torr, what would be the volume of the gas sample? (Assume that vapor pressure of water at 25°C is 23.8 torr.)
4)Heating a 5.374-g sample of an ore containing a metal sulfide, in the presence of excess oxygen, produces 1.327 L of dry SO2, measured at 18.0°C and 791 torr. Calculate the percentage by mass of sulfur in the ore.
The product of this reaction contains two stereocenters. Due to the stereospecificity of the bromination and the symmetry of the product, however, only the meso-diastereomer of stilbene dibromide is produced.
How would you prepare 125.0 mL of 0.35 M NaOH solution from a stock solution that has 2.25 M
Calculate the pH of a solution conposed of 0.0831M ammonia (NH3) and 0.113M ammonium chloride (NH4Cl).
A student dissolves 1.50g of copper(II) nitrate in water. After adding aqueous sodium carbonate solution which contains 1.80g of sodium carbonate, the student obtains 0.875g of CuCO3 precipitate.
Why is I2 the limiting reactant in the form of SnI2. look at the redox potentials for all possible reactions.
Choose the metal that is produced by electrolysis of its molten chloride salt. a) Li b) K c) Al d) Ca e) All of the above
How much more soluble is AgCl in 1 Molar NH3 than in water?
Complete and Balance including physical states and solubility rules. MgCL2 (aq) + K3PO4 (aq)
7. 0.500 g each of hydrogen, H2, and carbon monoxide, CO, are introduced into an evacuated 250. mL flask. What will be the total pressure (in atm) in the flask at 22ºC? How much of the pressure will be due to hydrogen
How many faradays of electricity are required to produce 0.84L of O2 at exactly 1 atm and 25 degrees Celcius from aqueous H2SO4
If C6H12O6 >>> 2 C2H5OH + 2 CO2 represents the fermentation of sugar to produce alcohol, and reaction is only 40.0% efficient (% yield), what is the actual yield of alcohol from 454g of C6H12O6
Question- A 9.35L container holds a mixture of 2 gases at 35 degree Celsius. The partial pressure of gas A and B respectively are .438 atm and .789 atm. If .130 mol of a third gas is added, what is the total pressure
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