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Determine the molar mass of an unknown gas, if that unknown gas effuses via an orifice at a rate 5.42 x 10 ^-9 mol s^-1, and methane (CH4) effuses through the same orifice at the rate of 1.30 x 10^-8 mol s^-1, both gases having the same temperature and pressure.
Liquid nitrogen has a density of 0.808g/ml at 77 K. A sample of 2.5 L of liquid nitrogen is allowed to evaporate at 21°C and 1.00 atm of pressure. what volume will the nitrogen gas occupy?(keep your phases straight)
Calculate the amount of heat that must be absorbed by 10.0 g of ice at -20°C to convert it to liquid water at 60.0°C. Given: Specific heat (ice) = 2.1 J/g·°C Specific heat (water) = 4.18 J/g·°C ?Hfus = 6.0 kJ/mol A) 420 J B) 2,900 J C) 6,300 J D) ..
You have a stock solution of 14.8 M ammonia. How many milliliters of this solution should you dilute to make 804 mL of a 1.64 M ammonia solution
The activation energy of a reaction is the difference between the energy states of reactants and the products
A 35.0-mL sample of 0.20 M LiOH is titrated with 0.25 M HCl. What is the pH of the solution after 23.0 mL of HCl have been added to the base?
For each pair of substances, circle the one with higher molar entropy (So). Justify each choice with a brief explanation. Circle the substance with greater molar entropy. Why is its entropy greater
A unique iron ore (Fe3O2) produces metallic ion (Fe) and carbon dioxide when heated in carbon monoxide atmosphere. The unbalanced equation for this process is: Fe3O2(s) + CO (g) → Fe (s) + CO2(g).
A 30.0-mL volume of 0.50 M CH3COOH (Ka=1.8x10^-5) was titrated with 0.50 M NaOH. Calculate the pH after addition of 30.0 mL of NaOH
Calculate the final temperature of the helium inside the cylinder. Assume helium to be an ideal gas with Cp=(5/2)R.
The higher heating value (HHV) of a fuel is its standard heat of combustion at 25 C with liquid water as a product; the lower heating value (LHV) is for water vapor as product.
Determine the freezing point (°C) of a 0.015 molal aqueous solution of MgSO4. Assume i = 2.0 for MgSO4. The molal freezing-point-depression constant of water is 1.86 °C/m..
A 2.50 liter container is filled with 175g of Argon. If the pressure is 10.0 atm, what is the temperature.part B: If the temperature is 225 K, what is the pressure
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