11/13/22

Balance this half-reaction in acid. You must show all work and label if it is a reduction or an oxidation half-reaction.
a. Balance this half-reaction in acid. You must show all work and label if it is a reduction or an oxidation half-reaction. C2H3O21- → CO2.b. Balance the same half-reaction in base. You must show... more
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11/13/22

Hydracarbon Combustion
A mixture of hydrocarbons contains 38.6%, C6H14, 13.7% octane, C8H18, and 47.7% decane, C10⁢H22. The mixture is combusted in an excess of oxygen. What mass of CO2 is generated from the combustion... more
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11/12/22

Chapter 11 Chemistry Charles's Law
A sample of gas in a balloon has an initial temperature of 1.0 ∘C and a volume of 1.04×103 L . If the temperature changes to 68 ∘C , and there is no change of pressure or amount of gas, what is the... more
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11/12/22

What volume in milliliters of 0.0160 M Ba(OH)₂ is required to neutralize 50.0 mL of 0.0500 M HBr?
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11/12/22

What mass of precipitate (in g) is formed when 80.2 mL of 0.500 M AlBr₃ reacts with excess AgNO₃ in the following chemical reaction? AlBr₃(aq) + 3 AgNO₃(aq) → 3 AgBr(s) + Al(NO₃)₃(aq)
What mass of precipitate (in g) is formed when 80.2 mL of 0.500 M AlBr₃ reacts with excess AgNO₃ in the following chemical reaction? AlBr₃(aq) + 3 AgNO₃(aq) → 3 AgBr(s) + Al(NO₃)₃(aq)
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11/12/22

Analytical Chemistry Question
The active ingredient in a zinc nutritional supplement is ZnSO4⋅7H2OZnSO4⋅7H2O (molar mass = 287.58 g/mol). Ten zinc tablets containing a mix of the active ingredient and an inactive filler were... more
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11/12/22

A solution is made by mixing 43.0 mL of ethanol, C2H6O, and 57.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 ∘C?


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11/12/22

chemistry question help
A sample of argon gas occupies a volume of 0.0450 m^3 at 101.3 kPa and 25.0∘C. What volume would the same sample of gas occupy if the pressure was increased to 161.0 kPa at constant temperature.
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11/11/22

The equilibrium constant for the chemical equation N2(g)+3H2(g)↽−−⇀2NH3(g) is K p = 0.0343 at 257 °C. Calculate the value of the 𝐾c K c for the reaction at 257 °C .
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11/11/22

Consider the reaction. A(aq)↽−−⇀3B(aq) 𝐾c=3.14×10−6 at 500. If a 3.20 M sample of A is heated to 500 K , what is the concentration of B at equilibrium?
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11/11/22

At 311 K, this reaction has a 𝐾c value of 0.0398 . X(g)+3Y(g)↽−−⇀2Z(g) Calculate 𝐾p K p at 311 K.
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11/11/22

Calculating Energy and Wavelength help?
Calculate the energy in joules and the wavelength in nanometers of the spectral line produced in the hydrogen spectrum when an electron falls from the third Bohr orbit to the first. (Report your... more
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11/11/22

Consider the reaction. A(aq)↽−−⇀2B(aq) 𝐾c=5.90×10−6 at 500 K. If a 2.00 M sample of A is heated to 500 K, 500 K, concentration of B at equilibrium?
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11/11/22

Chemistry problem!
How much is needed pure oxygen when 300 kg of methanol burns perfectly?
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11/10/22

What is the final temperature ( 𝑇f ) of the two objects after thermal equilibrium is reached?
A 981 g copper pan is removed from the stove at a temperature of 150 °C. It is then stacked on top of a 687 g aluminum sheet at room temperature, 25 °C. The specific heat capacity for copper is... more
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11/10/22

Explain what a limiting reactant is and describe the process to determine the limiting reactant in the example below:
Given 3.4 grams of x element with a molar mass of 24 g/mol and 4.2 grams of y element with a molar mass of 35 g/mol. How much of compound xy2 can be generated?
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11/10/22

Help with chemistry work
3 Ba + Al2(SO4)3 → 2 Al + 3BaSO4If you have .65 moles of Ba and .50 mole of Al2(SO4)3, what is the excess reactant?
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11/10/22

Calculate the boiling point of a 13.50 𝑚 aqueous solution of ethylene glycol.
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11/10/22

chemist combined chloroform (CHCl3) and acetone (C3H6O) to create a solution where the mole fraction of chloroform, 𝜒chloroform, is 0.203 .

The densities of chloroform and acetone are 1.48 g/mL1.48 g/mL and 0.791 g/mL,0.791 g/mL, respectively.Calculate the molarity of the solution. Assume the volumes are additive.then calculate the... more
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11/10/22

if we have the equation BaSO4(s) = Ba2+ (aq) + SO4 2-(aq) and we add OH- which way would the equilibrium shift?
i was just told that it shifts right but why?
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11/10/22

chem question help
Determine the maximum amount of S8​ that could be produced by reacting 53.0 g of each reagent.8 SO2 + 16 H2S -> 3 S8 + 16 H2O
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11/10/22

chemistry queston
Based on the balanced reaction below, determine the number of grams of oxygen required to completely react with 2.15 g of propane, C3H8C3H8(g) + 5 O2(g) -> 3 CO2(g) + 4 H2O(l)
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11/10/22

Heat of reaction

When 9.85 grams of potassium hydroxide(KOH) are dissolved in 150.0 grams of water at 25.0 °C in an insulated container, the temperature of the water increases to 40.1 °C. Assuming that the specific... more
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11/10/22

Enthalpy of a solution

The enthalpy of solution (🔼H) of KOH is -57.6 kJ/ mol. If 2.26 g KOH is dissolved in enough water to make a 150.0 mL solution, what is the change in temperature (°C) of the solution? (The specific... more
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11/10/22

Calculate the pressure of 33.5 g of carbon dioxide gas under 4.2 L container at 39.2 deg C. R = 0.0821 L atm/mol K.
Formula to use: PV= nRTThis question is also involved with molar mass and convert any deg C into K.
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