07/21/23

Select the statement that is false for an average reaction rate plot.
None of the aboveThe average rate of change is fastest at the beginning of the experimentThe average rate of change is constant after enough time has elapsedThe average rate of change is constant... more
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07/21/23

The reaction 2A + 2B → 2C + D is first order in A and zeroth order in B. When [A]=0.03M and [B]=0.05M, the initial rate of the reaction is 7E-5 M/s. What is the value of the rate constant (k)?

Answer choices:1.4E-3 s-14.6E-2 s-1 2.3E-3 s-1 7.5E-5 s-1 None of the above
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07/21/23

If the rate of formation of C is 0.526 M/s, what is the rate of disappearance of B for the following reaction A + 3B → 2C?
0.088 M/s None of the above 0.274 M/s 0.589 M/s 0.789 M/s
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07/21/23

What is the order of B in the reaction A + B -----> C
Second orderFirst orderZero orderMore information is neededNone of the above
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07/21/23

In the reaction of C5H12 + O2 = CO2 + H2O, the rate of formation of CO2 is 0.18 M/s. What is the rate of formation for C5H12 in M/s?
Answer choices: (Δ[O2])/Δt = -0.216(Δ[O2])/Δt = 0.18 (Δ[O2])/Δt = -0.288 None of the above (Δ[O2])/Δt = -0.036
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07/21/23

What is the order of the following expression, 2A+ 2B------> C .
All of the aboveNone of the above Zero order First order None of the above
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07/21/23

What steps are needed to calculate the number of atoms of H in 5.00 g of CH4
What steps are needed to calculate the number of atoms of H in 5.00 g of CH4
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07/20/23

Chemistry Calculating mass in equilibrium reaction
Bromine monochloride is synthesized using the reactionBr2(g)+Cl2(g)↽−−⇀2BrCl(g) 𝐾p=1.1×10−4 at 150 A 204.0 L204.0 L flask initially... more
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07/19/23

The reaction 3A + 2B → 2C + 6D is found to be third order overall and third order with respect to A. What is the most likely rate law?

rate = k[A]^3 None of the above rate = k[A]^3[C] rate = k[A]^3[B]^2 rate = k[B]^3
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07/18/23

Solubility product constant
The 𝐾sp of zinc hydroxide, Zn(OH)2, is 3.00×10−17. Calculate the solubility of this compound in grams per liter.solubility: ? g/L
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07/17/23

Titrations of Weak Acids
Calculate the pH at the equivalence point for the titration of 0.210 M0.210 M methylamine (CH3NH2)(CH3NH2) with 0.210 M HCl.0.210 M HCl. The 𝐾b of methylamine is 5.0×10−4.5.0×10−4.pH=?
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07/17/23

Ionization Reactions
Write the balanced 𝐾a and 𝐾b reactions for HSO−3HSO3− in water. Include physical states for each species.𝐾a:HSO−3(aq)+H2O(l)↽−−⇀H3O+(aq)+SO2−3(aq)HSO3−(aq)+H2O(l)↽−−⇀H3O+(aq)+SO32−(aq)𝐾b: ?
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07/17/23

Ionization reactions
Write the chemical reaction for chlorous acid in water, whose equilibrium constant is 𝐾a. Include the physical states for each species.𝐾a reaction:Write the chemical reaction for the chlorite ion... more
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07/17/23

Acid based properties
NH3 is a weak base ( 𝐾b=1.8×10−5 ) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.045 M in NH4Cl at 25 °C? pH= ?
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07/15/23

Calculate the mass percent of Oxygen

Calculate the mass percent of Oxygen inSethium Oxide (St2 O3) using the masses shown below:St - 192.09O - 15.999
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07/13/23

Volume Molarity
What volume in mL of 0.484 M Kbr is required to fully react with 69.41 mL of 0.183 M Pb(ClO4)2?
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07/12/23

Chemistry 2 - Equilibrium Constant
At 423 K, this reaction has a 𝐾c value of 0.0659.X(g)+3Y(g)↽−−⇀2Z(g)Calculate 𝐾p at 423 K. Note that the pressure is in units of atmosphere (atm).𝐾p= ?
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07/12/23

Chemistry 2 - Equilibrium Constant
The equilibrium constant for the chemical equationN2(g)+3H2(g)↽−−⇀2NH3(g)is 𝐾p=0.0328 at 201 ∘C. Calculate the value of 𝐾c for the reaction at 201 ∘C.𝐾c= ?
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07/12/23

Chemistry 2 - Activation energy
Calculate the activation energy, 𝐸a, in kilojoules per mole for a reaction at 57.0 ∘C that has a rate constant of 0.297 s−1 and a frequency factor of 6.66×10^11 s−1.𝐸a = ? kJ/mol
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07/12/23

Chemistry 2 - Ice
When determining the equilibrium concentrations for the reactionAB(g)↽−−⇀A(g)+B(g)𝐾c=[A][B][AB] a simplifying assumption can be used under certain conditions to avoid solving a quadratic... more
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07/12/23

Chemistry 2 - Calculating using ICE
Consider the given reaction.A(aq)+B(s)↽−−⇀C(aq) 𝐾=9.40Suppose 18.5 mol A reacts with excess B in 9.15 L of solution. Calculate the concentration of C at equilibrium.[C]= ? M
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07/12/23

Chem 2 - Rate law

The rate constant for this first-order reaction is 0.0152 s−1 at 300 °C. A⟶products If the initial mass of A is 17.92 g, calculate the mass of A remaining after 1.91 min. mass of A: ? g
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07/11/23

Chemistry help?
Ethylene glycol (C₂H₆O₂) is used as an additive to the water in your automobile to lower its freezing point. A solution of ethylene glycol in water has a freezing point of -5.80 °C. What mass (in... more
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07/10/23

What is the number of formula units in a 6.70 mol sample of FeCl3
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07/10/23

Balance the following redox reaction in basic solution. TeO₃²⁻(aq) + As(s) → Te(s) + H₂AsO₄⁻(aq)
Balance the following redox reaction in basic solutionComplete and balance the following redox reaction in basic solution. Be sure to include the proper phases for all species within the... more
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