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A sample of the gas butane (C4H10), of unknown mass, is contained in a vessel of unknown volume, V, at 24.8 degress celsius and a pressure of 560.0 torr. To this vessel 8.6787g of Ne are added in such a way that no butane escapes. The total pressure of the vessel (at the same temperature) is 1420 torr. Calculate the volume of the vessel and the mass of the butane.
What causes the heating that is seen in the thermosphere? What causes the heating that is seen in the stratosphere? What is the biological importance of ozone in the stratosphere?
A solution contains some or all of the ions Cu^{2+}, Al^{3+}, K^+, Ca^{2+}, Ba^{2+}, Pb^{2+}, and {NH_4}^+. The following tests were performed, in order, on the solution
the enthalpy of formation of ethanol, C2H5OH, is -277.0 kJ/mol at 298.15k. calculate the enthalpy of combustion of one mole of ethanol, assuming that the products are CO2 (g) and H2O.
If 358 mL of H2SO4 is neutralized with 60.0 mL of 1.50 M NaOH, what is the initial concentration of the acid?
Elemental exonium (not a real element) consists of 2 major isotopes Abundance Mass 31% 95 amu,69%. 118 amu What is the atomic weight for exonium.
The temp of the water and that of the gas are identical at 26°C. How many moles of Helium have been evolved?
You dissolve 12.6352 g of potassium iodide in water and bring the volume of solution to 250.0 ml. What is the molar concentration of KI and what volume of 0.0436 molar hydrochloric acid is required to react with 30.0 ml of 0.0278 molar LiOH?
A glass bottle of normal capacity 250 cm^(3) is filled brim full of water at 20 degrees Celsius. If the bottle and contents are heated at 50 degrees Celsius, how much water spills over?
How much potassium nitrate has to dissolve in water to absorb 114 kJ of heat?
consider a stone column 3.00 ft in diameter and 10.00 ft high. What is is mass in pounds if its density is 3.50 g/mL.
The pressures ranges between 0.2 bar and 60 bar. Determine the net work produced and the efficiency of the cycle?
A steel cylinder with nitrogen, hydrogen, and ammonia gases is at 500°C and 4.91 atm. If the partial pressure of nitrogen is 1850 mmHg and hydrogen is 1150 mmHg
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