04/21/23

Chemistry related question

The reaction for the formation of ammonia by direct combination is N2 + 3H2 →← 2NH3 ∆H = –92 kJ (A) doubling the concentration of hydrogen (B) reducing the total pressure (C) raising the... more
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04/21/23

Chemistry related

When equilibrium has been reached in the reaction AE + CD →← CE + AD + x kJ in which all substances are in solution, (A) adding AE will increase the concentration of CE but not of AD. (B)... more
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04/21/23

What are the spectator ions in this equation?
Sodium thiosulfate + hydrochloric acid -> Sodium chloride + water + sulfur dioxide + sulfurNa2S2O3 (aq) + 2 HCl (aq) -> 2 NaCl (aq) + H20 (l) + S02 (g) + S (s)Break apart2Na + 2S + 3O + 2H +... more
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04/20/23

The kinetics of a gas phase reaction of the form A → Products results in a rate constant of 1.308 M⁻¹ s⁻¹.

For this reaction, the initial concentration of A is 0.571 M. What is the half-life for this reaction?. At what time would the concentration of A reach 0.042 M?
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04/20/23

The activation energy, Ea, for a particular reaction is 19.4 kJ/mol. If the rate constant at 80 °C is 0.820 M⁻¹s⁻¹, then what is the value of the rate constant at 243 °C? (R = 8.314 J/mol • K)
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04/20/23

Determine Ksp for Cu(IO3)2 by ICE Table. Molar solubility of Cu(IO3)2 is 2.7 x 10^-3
please provide ice table w/ changes
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04/20/23

If the prepared solution was made with 4.00 × 10⁻⁴ M lithium fluoride and 4.00 × 10⁻⁴ M of zinc chloride, evaluate the reaction quotient, Q, for zinc fluoride at these values.
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04/20/23

Determine Ksp for Cu(IO3)2 by ICE Table. Molar solubility of Cu(IO3)2 is 2.7 x 10^-3
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04/19/23

How many coulombs of charge are necessary to produce 101 g of Al from Al³⁺(aq)? (F = 96,500 C/mol)
Please Answer :)How many coulombs of charge are necessary to produce 101 g of Al from Al³⁺(aq)? (F = 96,500 C/mol)
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04/19/23

Kinetics and Rate Law
What is the half-life for a particular reaction if the rate law is rate = (1301 M*min⁻¹)[A]⁰ and the initial concentration of A is 0.250 M?
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04/17/23

Chemistry HW question

NOTE: You may never use the dilution equation in place of stoichiometry for a reaction.1) A 10.00 mL aliquot of 0.010 M CaCO3 is titrated with 18.22 mL of EDTA solution. What is the EDTA... more
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04/17/23

please help me ...
You heat 3.854 g of a mixture of Fe3O4 and FeO to form 4.148 g Fe2O3. The mass percent of FeO originally in the mixture was: A) 92.9% B) 55.8% C) 44.2% D) 38.5% E) none of these
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04/17/23

Chemistry help!
You would like to produce a gold-plated coin by plating gold onto a penny 1.90 cm in diameter. How many days will it take to produce a layer of gold 0.250 mm thick (on both sides of the coin) from... more
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04/17/23

Using the mass percentage of oxygen in KClO3 (43.4%), calculate the maximum amount of oxygen in grams you could produce with 1.503g of KClO3 that you heat.

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04/17/23

weak base ionization help
A buffered solution containing dissolved aniline, C6H5NH2, and aniline hydrochloride, C6H5NH3Cl, has a pH of 5.66A. Determine the concentration of C6H5NH3+ in the solution if the concentration... more
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04/17/23

Calculate the ratio of CH3NH2 to CH3NH3Cl required to create a buffer with pH = 10.26.
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04/17/23

What mass of ammonium chloride should be added to 2.65 L of a 0.165 M NH3 in order to obtain a buffer with a pH of 9.65?
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04/17/23

Consider the following equation in aqueous solution: PO₃³⁻(aq) + SO₂(g) → PO₄³⁻(aq) + S²⁻(aq) Write the balanced half-reaction for the oxidation in acidic solution.
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04/16/23

Calculate the standard entropy change for the reaction at 25 °C. Standard molar entropy values can be found in this table. 2CH3OH(g)+3O2(g)⟶2CO2(g)+4H2O(g)
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04/15/23

Chemistry HW question

If each of these ions were reduced to metal with one coulomb, which would yield the greatest mass?(A) Cu^2+ (aq)(B) Ag^+ (aq)(C) Hg^2+ (aq)(D) Cu^+ (aq)
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04/15/23

Chemistry HW question

A given amount of electric charge deposits 2.159 g of silver from an Ag+ solution. What mass of copper from a Cu^2+ solution will be deposited by the same quantity of electric charge?Atomic Molar... more
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04/15/23

Chemistry HW question

Nickel is a transition element and has a variable valence. Using a nickel salt, 2 F (faradays) plate out 39.2 g of nickel. What ions are in the solution of this salt?Atomic molar mass: Ni (58.7 g... more
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04/14/23

Chemistry lab 10
When the Pb2+ concentration is 1.40 M, the observed cell potential at 298K for an electrochemical cell with the following reaction is 2.337V. What is... more
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04/14/23

Question In Description
B) If a cylinder in an automobile engine has a volume of 525 cm3, how many moles of oxygen would be present at 90.0°C and 0.995 atm? Air is 20.95 percent oxygenC) Calculate the maximum number of... more
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04/14/23

how many molecules are in 75.8 g of NaCl?
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