638 Answered Questions for the topic AP chemistry

Ap Chemistry Science Chemistry

02/18/18

How do I solve this problem on a first order reaction?
The reaction 2NO2 (g)+O3 (g)==>N2O5 (s)+O2 (g) is first order with respect to  each reactant   A. Write the rate expression for the reaction    B. How does doubling the the concentration of... more
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Ap Chemistry Science Chemistry

02/18/18

How do I solve this rate law problem on the decomposition of ammonia on a platinum surface at 856°C
In the decomposition of ammonia on a platinum surface at 856°C   2NH3(g)+==>N2(g)+3H2 (g)   Changing the concentration of nh3 has no effect on the rate.  How do I write the rate law?
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Ap Chemistry Science Chemistry

02/18/18

How do I solve this rate law problem
A reaction has the experimental rate law of rate=k [A]^2   A. What happens to the rate if the concentration of A is tripled?   B. What happens to the rate if the concentration if A is reduced... more
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Ap Chemistry Science Chemistry

02/18/18

How do I solve this problem on equilibrium pressures?
The following equilibrium pressures at a certain temperature were observed for the reaction:   2NO2 (g)<==>2NO (g)+O2   P (NO2)=0.55atm P (NO)=6.5×10^-5 atm P (O2)= 4.5×10^-5... more
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Ap Chemistry Chemistry

02/16/18

How do I solve this AP Chemistry problem?
At a given temperature, K=1.3×10^-2 for the reaction calculate values of K for the following reactions at this temperature   At a given temperature K=1.3×10^-2 for the reaction N2 (g)+3H2... more
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Ap Chemistry Chemistry

02/16/18

How do I write the equilibrium expression for each of the reactions below
A.N2 (g)+O2==>2NO (g)B. 2NH (g)==>N2 (g)+ 3H2 (g)C. NH3 (g)==> 1/2N2(g)+3/2H2(g)D. 2N2 (g)+6H2 (g)==>4H3 (g)
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Ap Chemistry Chemistry

02/16/18

How do I write the equilibrium expression (K) for each of the following gas phase reactions?
A.N2 (g)+O2==>2NO (g) B. 2NH (g)==>N2 (g)+ 3H2 (g) C. NH3 (g)==> 1/2N2(g)+3/2H2(g) D. 2N2 (g)+6H2 (g)==>4H3 (g)    
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Ap Chemistry Science Chemistry

02/11/18

How do I solve this AP Chemistry problem on an antidote for cobra venom
You and a co-worker have developed a molecule that has shown potential as cobra antivenom  (AV). This antivenom works by binding to the venom  (V), thereby rendering it nontoxic. This reaction can... more
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Ap Chemistry Science Chemistry

02/11/18

How do I solve this Chemistry problem on cobra venom
Cobra venom helps the snake secure food by binding to acetylchlorine receptors on the diaphram of a bite victim, leading to the loss of function of the diaphragm muscle tissue and eventually death.... more
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Ap Chemistry Science Chemistry

02/10/18

How do I solve this AP Chemistry problem on biodiesel
In an effort to become more environmentally friendly, you have decided that your next vehicle will run on biodiesel that you will produce yourself. You have researched how to make the biodiesel in... more
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02/09/18

How do I solve this AP Chemistry problem on catalysts?
 A famous chemical demonstration is the "magic genie" procedure, in which hydrogen peroxide decomposes to water and oxygen gas with the aid of a catalyst. The activation energy of this... more
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Ap Chemistry Science Chemistry Physics

02/07/18

How do I solve this AP Chemistry problem on the decomposition of HI(g)?
The activation energy for the decomposition of HI (g) to H2 (g) and I2 (g) is 186 kJ/mol. The rate constant at 555K is 3.52×10^-7 L/mol•s. What is the rate constant at 645K?
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Ap Chemistry Science Chemistry Physics

02/07/18

How do I solve this Chemistry problem on activation energy?
The rate constant  for the gas phase decomposition of N2O5 has the following temperature dependence    T (K)       k (s^-1)               4.9×10^-3 338.        5.0×10-4 318         ... more
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Ap Chemistry Science Chemistry Physics

02/07/18

How do I solve this AP Chemistry problem?
How do I calculate the activation energy for the reverse of the reaction NO(g) +CO(g) ==>NO(g) CO₂(g), given the activation energy for the forward reaction for the forward reaction is 125kJ/mol... more
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Ap Chemistry

02/06/18

If 8.09 mL of .40M NiSO4 is mixed with 2.13 mL distilled water, calculate the [Ni2+] in the resulting solution
How do you calculate the Nickel in the resulting solution?
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Ap Chemistry Chemistry

02/04/18

Equilibrium
What would happen if O2 were removed from the following system at equilibrium at 25 degrees C?   2NO2(g) <--> 2NO(G) + O2(G)      Kc=7.4*10^-1 a. NO2 and NO concentrations would... more
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Ap Chemistry Chemistry Physics

02/03/18

AP Chemistry Rate Question
The reaction:   2NO(g) +Cl2(g)====> 2NOCl (g)   was studied at -10°C. The following results were obtained were: Rate= -(change in Cl2 concentration)/(change in time)   [NO]0 (mol/l)   ... more
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Ap Chemistry Chemistry

02/01/18

Equilibrium and solubility product
In which of the following will PbBr2(s) be least soluble?   pure water 0.01M NaBr 0.01M KBr 0.02M NaBr PbBr2 will be equally soluble in all of the above solutions
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Ap Chemistry Science Chemistry

01/30/18

How do I solve this problem on the freezing point of a solution?
What is the freezing point of a solution containing 27.8 g of calcium chlorine in 250 g of water? Is calcium chloride an ionic or molecular splits and why is this important?
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Ap Chemistry Science Chemistry Physics

01/24/18

How do I solve this problem on the freezing and boiling point of ethylene glycol?
What volume of ethylene glycol, C2H6O2, a nonelectrolyte, must be added to 15.0 L of water to produce an antifreeze solution with a freezing point of -25*C? What is the boiling point of the... more
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Ap Chemistry Science Chemistry

01/23/18

How do I calculate the mole fraction of methanol?
The normal boiling point of methanol is 64.7°C. A solution  containing a nonvolatile solute dissolved in methanol has a vapor pressure of 710.0 torr at 64.7°C. What is the mole fraction of the... more
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Ap Chemistry Math Science Chemistry

01/15/18

How do I solve this problem on the critical point of NH3?
The critical point of NH3 is 132°C and 111 atm and the critical point of N2 is -147°C and 34 atm. Which of these substances cannot be liquefied at room temperature no matter how much pressure is... more
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Ap Chemistry Math Science Chemistry

01/15/18

How do I solve this problem on air conditioners and evaporation?
In regions with dry climates, evaporative coolers are used to cool the air. A typical electric air conditioner is rated at 1.00×10^4 Btu/he. What quantity of water must be evaporated each hour to... more
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Ap Chemistry Math Science Chemistry

01/15/18

How do I solve this Chemistry problem on the phase changes of water?
A 20.0-g sample of ice at -10°C is mixed with 100.0 g of water at 80°C. Calculate the final temperature of assuming no heat loss to the surroundings. The heat of capacities of ice and water are... more
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Ap Chemistry Math Science Chemistry

01/15/18

How do I solve this AP Chemistry on Boron Nitride?
Boron Nitride ( BN) exists in two forms. The first is a slippery solid former from the reaction from BCl3 and NH3, followed by heating in a ammonia atmosphere at 750°C. Subjecting the first form of... more
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