Search found 21 matches
- Sun Dec 10, 2017 8:39 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Replies: 1
- Views: 572
Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
23. At 500. K, the equilibrium constant, Kc, equals 1.0 x 1012 for: 2 SO2 (g) + O2 (g) ⇌ 2 SO3 (g) If analysis shows that the composition is 5.0 M for SO3, 0.50 mM for SO2, and 0.20 mM for O2, is this reaction at equilibrium? If not, in which direction does the reaction tend to proceed to reach equi...
- Sun Dec 10, 2017 3:10 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Replies: 2
- Views: 450
Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
What does the term heterogeneous reaction mean?
- Sun Dec 10, 2017 3:10 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Replies: 3
- Views: 499
Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
23. What does the term homogeneous reaction mean?
- Sat Dec 09, 2017 1:11 am
- Forum: DeBroglie Equation
- Topic: DeBroglie Equation
- Replies: 1
- Views: 368
DeBroglie Equation
33. Calculate the de Broglie wavelength of an electron (mass = 9.11 x 10-31 kg) traveling at 5.3 x 106 m.s-1? Do you think your calculated wavelength, for electrons with similar velocities, could be experimentally verified/detected in the lab?
- Fri Dec 08, 2017 12:51 am
- Forum: Limiting Reactant Calculations
- Topic: Limiting Reactant Calculations [ENDORSED]
- Replies: 3
- Views: 655
Limiting Reactant Calculations [ENDORSED]
20. How many moles of CO2(g) are produced when 1 kg of CaCO3(s) is used to neutralize an acid spill? The equation for the reaction at 1 atm and 25 degrees C is:
CaCO3(s) + H2SO4(aq) ---> CaSO4(s) + CO2(g) + H2O(l)
How do we know that CaCO3 is the limiting reagent?
CaCO3(s) + H2SO4(aq) ---> CaSO4(s) + CO2(g) + H2O(l)
How do we know that CaCO3 is the limiting reagent?
- Tue Nov 28, 2017 3:27 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Non-Equilibrium Conditions & The Reaction Quotient
- Replies: 2
- Views: 767
Non-Equilibrium Conditions & The Reaction Quotient
If the initial amounts of CO and H2O were both 0.100 M, what will be the amounts of each reactant and product at equilibrium for the following reaction? Keq = 23.2 at 600K
CO (g) + H2O (g) ⇌ CO2 (g) + H2 (g)
CO (g) + H2O (g) ⇌ CO2 (g) + H2 (g)
- Tue Nov 28, 2017 1:59 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: ICE box
- Replies: 1
- Views: 273
ICE box
A researcher fills a 1.00 L reaction vessel with 1.84 x 10-4 mol of BrCl gas and heats it to 500 K. At equilibrium, only 18.3 % of the BrCl gas remains. Calculate the equilibrium constant, assuming the following reaction is taking place.
2BrCl(g) ⇌ Br2 (g) + Cl2(g)
2BrCl(g) ⇌ Br2 (g) + Cl2(g)
- Tue Nov 28, 2017 1:26 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Reaction quotient
- Replies: 1
- Views: 512
Reaction quotient
At 500. K, the equilibrium constant, Kc, equals 1.0 x 1012 for: 2 SO2 (g) + O2 (g) ⇌ 2 SO3 (g) If analysis shows that the composition is 5.0 M for SO3, 0.50 mM for SO2, and 0.20 mM for O2, is this reaction at equilibrium? If not, in which direction does the reaction tend to proceed to reach equilibr...
- Tue Nov 28, 2017 12:03 am
- Forum: Ideal Gases
- Topic: Partial pressures
- Replies: 4
- Views: 786
Partial pressures
The reaction 2 SO2 (g) + O2 (g) ⇌ 2 SO3 (g) occurs in a 1.00 L flask at 312 K and at equilibrium the concentrations are 0.075 mol.L-1 SO2 (g), 0.537 mol.L-1 O2 (g), and 0.925 mol.L-1 SO3 (g). Calculate their respective partial pressures at 312 K using R = 8.206 × 10-2 L.atm.K-1.mol-1.
- Mon Nov 27, 2017 10:49 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Chemical Equlibrium
- Replies: 1
- Views: 262
Chemical Equlibrium
Why are equilibrium constants useful? A. One number that gives us information about the relative concentrations of reactant and product. B. One number that gives us information about the relative production rates of reactant and product. C. One number that gives us information about the relative act...
- Mon Nov 27, 2017 10:30 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Chemical Equlibrium
- Replies: 2
- Views: 393
Chemical Equlibrium
Why are equilibrium constants useful? A. One number that gives us information about the relative concentrations of reactant and product. B. One number that gives us information about the relative production rates of reactant and product. C. One number that gives us information about the relative act...
- Wed Nov 08, 2017 12:50 am
- Forum: Molarity, Solutions, Dilutions
- Topic: Molarity, Solutions, Dilutions [ENDORSED]
- Replies: 1
- Views: 420
Molarity, Solutions, Dilutions [ENDORSED]
A 1.000g sample of XI2 is dissolved in water, and excess silver nitrate (AgNO3) is added to precipitate all of the iodide as AgI. The mass of the dry AgI is found to be 1.597g. What is the identity of X2+?
- Wed Nov 08, 2017 12:34 am
- Forum: Molarity, Solutions, Dilutions
- Topic: molarity [ENDORSED]
- Replies: 1
- Views: 356
molarity [ENDORSED]
A solution is prepared by dissolving 0.500 g KCL, 0.500 g K2S, and 0.500 g K3PO4 in 0.500 L water. What is the concentration in the final solution of (a) potassium ions; (b) sulfide (S2-) ions?
- Mon Oct 30, 2017 10:38 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: problem help
- Replies: 5
- Views: 2066
Re: problem help
You are caught in a radar trap and hope to show that the speed measured by the radar gun is in error due to the Heisenberg uncertainty principle. If you assume that the uncertainty in your position was +/- 5 m when your speed was measured, and that the car has a mass of 2150 kg, what is your calcul...
- Mon Oct 30, 2017 10:33 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: uncertainty in kinetic energy
- Replies: 4
- Views: 3014
Re: uncertainty in kinetic energy
delta v= 3.4x10^10m.s-1(from pervious problem) (9.11x10^-31kg.e-)(6.022x10^23)=5.49x10^-7kg.mol
KE=1/2(9.11x10^-31kg.e-)(3.4x10^10m.s-1)^2 KE=1/2(5.49x10^-7kg.mol)(3.4x10^10m.s-1)^2
KE=5.3x10^-10J/e- KE=3.2x10^14J/mol
KE=1/2(9.11x10^-31kg.e-)(3.4x10^10m.s-1)^2 KE=1/2(5.49x10^-7kg.mol)(3.4x10^10m.s-1)^2
KE=5.3x10^-10J/e- KE=3.2x10^14J/mol
- Mon Oct 30, 2017 9:28 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Heisenberg Indeterminacy (Uncertainty) Equation
- Replies: 1
- Views: 374
Heisenberg Indeterminacy (Uncertainty) Equation
Calculate the uncertainty (indeterminacy) in position of an electron if its uncertainty in speed is one hundredth the speed of light?
to calculate deltaV would you multiple 3.00x10^8 (0.01)?
to calculate deltaV would you multiple 3.00x10^8 (0.01)?
- Mon Oct 30, 2017 5:13 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Heisenberg Indeterminacy (Uncertainty) Equation
- Replies: 2
- Views: 783
Heisenberg Indeterminacy (Uncertainty) Equation
The hydrogen atom has a radius of approximately 0.05 nm. Assume that we know the position of an electron to an accuracy of 1 % of the hydrogen radius, calculate the uncertainty in the speed of the electron using the Heisenberg uncertainty principle. Comment on your value obtained. How would we deter...
- Sat Oct 14, 2017 4:12 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric effect [ENDORSED]
- Replies: 6
- Views: 1102
Photoelectric effect [ENDORSED]
This and the following question relates to the same metal used in a series of photoelectric experiments. A. If 3.607 x 10-19 J is required to remove an electron with zero kinetic energy from a metal surface, what would be the longest wavelength light that could do this? a) KE= energy of photon - wor...
- Sat Oct 14, 2017 3:48 pm
- Forum: Photoelectric Effect
- Topic: How to calculate the kinetic energy, energy and frequency? [ENDORSED]
- Replies: 25
- Views: 7533
Re: How to calculate the kinetic energy, energy and frequenc [ENDORSED]
The steps to solve the problem are: 1. Use Ek = 1/2 mv^2 2. 2. Divide the total energy (work function) by Avogadro's number. 3. Use: kinetic energy of e- = energy of incoming photon – work function ****In addition to covering this in class, the course reader has detailed examples as does the textbo...
- Wed Oct 04, 2017 7:43 pm
- Forum: Limiting Reactant Calculations
- Topic: What is the mass of AgCl produced?
- Replies: 10
- Views: 9098
Re: What is the mass of AgCl produced?
After calculating the moles, how do you determine which is the limiting reactant. I know you have to compare the ratios however, I am not sure on what I'm looking for.
- Wed Oct 04, 2017 7:26 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Molarity and Dilution
- Replies: 11
- Views: 4485
Re: Molarity and Dilution
Why is this problem not a Mi * Vi= Mf* Vf, if it is giving you the final volume (125ml).