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Explain if an unknown gas takes 2.41 times longer to effuse than methane (CH4) then Define what is the molar mass of the unknown gas?
what is the emf measured at a platinum electrode relative to the standard h2 electrode in the solution that results
A 1.0-L buffer solution is 0.105M in HNO 2 and 0.145M in NaNO 2. Determine the concentrations of HNO 2 and NaNO 2 after addition of 1.4g NaOH.
If the partial pressure of a gas produced in a reaction was determined to be 0.35 atm in a 161.0 mL container and at a temperature of 25.0°C, how many moles of gas were produced? (Hint: Use the ideal gas law and convert temperature to Kelvin, volu..
a mixture contains two compounds x and y. both compounds x y have a solubility 1 g100 ml of solvent at the temperature
Four balloons, each with a mass of 10.0 g, are inflated to a volume of 20.0L, each with a different gas: helium, neon, carbon monoxide or nitrogen monoxide. If the density of air at 25 degrees C and 1.00 atm is 0.00117 g/mL, will any of the baloon..
A 2.00 gram peanut is burned in a bomb calorimeter containing 1234 grams of water. The temperature of the water increases from 25.00 Celsius to 30.25 Celsius.
A solution of this complex in a 1 cm cuvette had an absorbance of0.760 at this wavelength. Calculate the molarity of this solution.
if 646 mL of gas at 280 K Is heated to 297 K, what will the new volume be? using charles's law
Student prepared .10M solution of formic acid and found it's pH at 25 Celsius to be 2.38. What is the pKa of formic acid at this temperature?
C(s)+CO2(g)_2CO(g) ?H°=119.8KJ. Now after each change below, write an R if you believe the reaction will go to the right and an L if it shifts to the left.
At what temperature does benzene boil when the external pressure is 480 ?
What holds solids or liquids and carries out reactions? what is used to mix or combine two or more substances? what it used to support an iron ring or clamp?
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