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When an ion-selective electrode for X was immersed in 0.0460 M XCl, the measured potential was 0.0440 V. What is the concentration of X when the potential is 0.0590 V? Assume that the electrode follows the Nernst equation, the temperature is at 25°C, and that the activity coefficient of X is 1.
A molecule in which centers of positive and negative charge do not coincide must be.
A 4.50-g sample of liquid water at 25.0 C is heated by the addition of 133 J of energy. The final temperature of the water is __________ °C. The specific heat capacity of liquid water is 4.18 J/gK.
A gas sample containing N2 and O2 was found to contain 72% N2. If the pressure of the sample was 2.0 atm, what is the partial pressure of O2?
What is the molarity of a solution that contains 35.0 g of vitamin B1 hydrochloride (molar mass = 337 g/mol ) in 110 g of solution?
Consider the reaction 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s). If 12.5 g of iron(III) oxide (rust) are produced from 8.74 g of iron, how much oxygen gas is needed for this reaction?
Determine the pressure change when a constant volume of gass at 1.00 atm is heated from 20.0 C to 30.0C.
What is the millimolar concentration of dissolved oxygen for a lake or stream under the partial pressure of oxygen and a temperature of 12?
what is the concentration of toluene in air produced by vaporizing 1 ml of liquid toluene into clean air to produce a total volume of 100 liters? Toluene has a molecular weight of 92
If 37.0 grams of hydrogen sulfide gas (H2S; MM = 34.08 g/mol) react with 37.1 grams of oxygen gas (O2, MM = 32.00 g/mol), what is the mass of sulfur dioxide (SO2, MM = 64.06 g/mol) gas produced?
What is the rate law for step 2 of this reaction? Express your answer in standard MasteringChemistry notation. For example, if the rate law is type k*[A]*[C]^3.
A dead alkaline battery is found to contain a compound of Mn and O. Its analysis gives 69.9% Mn and 30.4% O. What is the empirical formula for the substance.
Determine the enthalpy change for the reaction. 2NO2 (g) -> 2NO(g) + O2(g) These are the given equations: NO + O3 -> NO2 + 02 DeltaH = -198.9 kJ / mol O3 -> (3/2)O2 DeltaH = -142.3 kJ/mol
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