25,963 Answered Questions for the topic chemistry

Chemistry

12/03/23

The rearrangement of methyl isonitrile, CH2NC to acetonitrile, CH3CN, is a first order reaction and has a half life of 0.76 h at 487 K
Calculate the rate constant for this reaction in inverse seconds.
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Chemistry

12/03/23

rate=K[X]^m. Determine the value of m if the rate increases by a factor of 9 when [X] is tripled.
A. Determine the value of m if the rate increases by a factor of 9 when [X] is tripled.B. Determine the value of m if the rate remains unchanged when [X] is tripled.
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Chemistry

12/03/23

HClO is a weak acid ( 𝐾a=4.0×10^−8 ) and so the salt NaClO acts as a weak base. What is the pH of a solution that is 0.029 M in NaClO at 25 °C? pH=
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Chemistry

12/02/23

Analytical Chemistry Redox Problem
Calculate Eo and K for the following reaction:5MnO2(s) + 4H+ -> 2MnO4- + 3Mn2+ + 2H2OI'm struggling with balancing the half-reactions of this problem. Any help would be appreciated, thanks so much. more
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Chemistry

12/02/23

Answer the four questions below regarding a particular type of alkaline battery in which the following half-reactions are used:
Answer the four questions below regarding a particular type of alkaline battery in which the following half-reactions are used:2MnO2 ​(s) + H2​O(l) + 2e- Mn2​O3 ​(s) + 2OH- (aq) ... more
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Chemistry

12/02/23

Calculate the cell potential (Ecell) for the following lead concentration cell at 298 K.
Calculate the cell potential (Ecell) for the following lead concentration cell at 298 K.[Pb2+] = 0.00100 M   [ Pb2+] = 2.75 M
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Chemistry

12/02/23

What is the reduction potential of a hydrogen electrode that is still at standard pressure, but has pH = 5.25 , relative to the SHE?
The reduction potential for all other half-reactions are measured relative to the half-reaction2H+ (aq) + 2e- H2​(g)Under standard conditions (pH=0.000, PH2 = 1 atm) this standard hydrogen... more
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Chemistry

12/02/23

Calculate Standard Potential and Equilibrium Constant
The standard potentials for the reduction of nicotinamide adenine dinucleotide (NAD+) and oxaloacetate (reactants in the multistep metabolism of glucose) are as follows:Oxaloacetate2- (aq) +... more
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Chemistry

12/02/23

Determine the equilibrium constant at 255 K for the following reaction under acidic conditions.
Determine the equilibrium constant at 255 K for the following reaction under acidic conditions.4H+(aq) + MnO2​(s) + 2Fe2+(aq) Mn2+(aq) + 2Fe3+(aq) + 2H2O(l)The two half-reactions are:MnO2 ​(s) +... more
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Chemistry

12/02/23

What is the value of Ecell for this reaction
What is the value of Ecell for this reaction when [Fe3+] = [Cu+] = 1.50 × 10–3 M and [Fe2+] = [Cu2+] = 2.50 × 10–4 M?  Consider an electrochemical cell based on the following reaction:Fe3+ (aq) +... more
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Chemistry

12/02/23

Given the following electrochemical cell, calculate the potential for the cell

Given the following electrochemical cell, calculate the potential for the cell in which the concentration of Ag+ is 0.0595 M, the pH of the H+ cell is 1.400, and the pressure for H2 is held... more
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Chemistry

12/02/23

What is the pH of a 10-8M solution of HCl?

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Chemistry

12/01/23

Write the balanced nuclear equation for the alpha decay of each isotope.
24496 Cm nuclear equation:?
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Chemistry

12/01/23

Consider the reaction N2(g)+O2(g)↽−−⇀2NO(g) N 2 ( g ) + O 2 ( g ) ↽ − − ⇀ 2 NO ( g ) that has an equilibrium constant, 𝐾c K c , fof 4.10×10−4 4.10 × 10 − 4 at 1700 1700 °C.
Consider the reaction N2(g)+O2(g)↽−−⇀2NO(g) N 2 ( g ) + O 2 ( g ) ↽ − − ⇀ 2 NO ( g ) that has an equilibrium constant, 𝐾c K c , fof 4.10×10−4 4.10 × 10 − 4 at 1700 1700 °C. What percentage of O2 ... more
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Chemistry

12/01/23

A mixture of 0.430 M H 2 O , 0.398 M Cl 2 O , and 0.732 M HClO are enclosed in a vessel at 25 ° C . H 2 O ( g ) + Cl 2 O ( g ) − ⇀ ↽ − 2 HOCl ( g ) K c = 0.0900 at 25 ° C Calculate the equilibrium

A mixture of 0.430 M H 2 O , 0.398 M Cl 2 O , and 0.732 M HClO are enclosed in a vessel at 25 ° C . H 2 O ( g ) + Cl 2 O ( g ) − ⇀ ↽ − 2 HOCl ( g ) K c = 0.0900 at 25 ° C Calculate the equilibrium... more
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Chemistry

12/01/23

Chemistry assignment 9
Phosphorus pentachloride decomposes according to the chemical equation PCl5(g)↽−−⇀PCl3(g)+Cl2(g)𝐾c=1.80 at 250 ∘C A 0.2850 mol sample of PCl5(g) is injected into an empty 2.95 L reaction... more
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Chemistry

12/01/23

Consider the given reaction. A(aq)+B(s)↽−−⇀C(aq)𝐾=9.40 Suppose 18.4 mol A reacts with excess B in 9.20 L of solution. Calculate the concentration of C at equilibrium. [C]= M
Consider the given reaction. A(aq)+B(s)↽−−⇀C(aq)𝐾=9.40 Suppose 18.4 mol A reacts with excess B in 9.20 L of solution. Calculate the concentration of C at equilibrium. [C]= M
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Chemistry

12/01/23

7. Consider the decomposition of a metal oxide to its elements, where M represents a generic metal. M3O4(s)↽−−⇀ 3M(s)+2O2(g)
Consider the decomposition of a metal oxide to its elements, where M represents a generic metal. M3O4(s)↽−−⇀ 3M(s)+2O2(g) SubstanceΔG°f(kJ/mol) M3O4(s) −6.80 M(s) 0 O2(g) 0 What is... more
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Chemistry

12/01/23

Write the balanced nuclear equation for the alpha decay of each isotope.
24496PO. (244 over 96)nuclear equation: ?bismuth-210nuclear equation?
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Chemistry

12/01/23

At a certain temperature, the equilibrium constant, Kc, for this reaction is 53.3. H2(g)+I2(g)−⇀2HI(g)Kc=53.3 At this temperature, 0.800mol H2 and 0.800 mol I2 were placed in a 1.00 L container to
At a certain temperature, the equilibrium constant, Kc, for this reaction is 53.3.H2(g)+I2(g)−⇀2HI(g)Kc=53.3At this temperature, 0.800mol H2 and 0.800 mol I2 were placed in a 1.00 L container to... more
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Chemistry

11/30/23

Enthalpy Calculations
Calculate the enthalpy of combustion (kJ/mol) of ethyl stearate (C₂₀H₄₀O₂), an important component of many biodiesel fuels made from soybean oil and ethanol, given the following standard enthalpies... more
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Chemistry

11/30/23

Calorimetry heat of reaction
A student adds 75.0 mL of a 1.80 M HCl to 75.0 mL of 1.80 M NaOH inside a calorimeter (C=77.0 J/C) and immediately places the lid on top. The solution temperature rises from 20.5C to 24.7C. The... more
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Chemistry

11/30/23

How many electrons in an atom can have the following designations?
5dz^2: ______ (electrons)1d: ______ (electrons)5d: ______ (electrons)7p: ______ (electrons) 6d: ______ (electrons)n=3: ______ (electrons)
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Chemistry

11/30/23

what is the enthalpy, Delta H for this reaction?
Given these reactions, where X represents a generic metal or metalloid1) H2(g)+ 1/2 O2(g) —> H2O(g) Delta H1= -241.8kJ2) X(s)+2Cl2(g) —> XCl4(s) Delta H2= 318.5kJ3) 1/2 H2(g) + 1/2 Cl2(g)... more
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Chemistry

11/30/23

Standard enthalpy of formation of C8H18?
For a particular isomer of C8H18 the combustion reaction produces 5093.7 kJ of heat per mole of C8H11(g) consumed, under standard conditions.C8H18(g)+ 25/2O2(g) —> 8CO2(g) + 9H2O(g)Delta H= -... more
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