14.33 The half-life for the second-order reaction of a substance A is 50.5 s when [A]0 =0.84 mol/L. Calculate the time needed for the concentration of A to decrease to (a) one-sixteenth; (b) one- fourth; (c) one-fifth of its original value.
How do you obtain the equation to begin this problem?
Search found 10 matches
- Sun Feb 22, 2015 5:54 pm
- Forum: Second Order Reactions
- Topic: 14.33 Equation for the half-life of a 2nd order reaction
- Replies: 2
- Views: 4646
- Tue Jan 20, 2015 10:17 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: 7.21 Set up of Calorimeter Problem
- Replies: 4
- Views: 2371
7.21 Set up of Calorimeter Problem
Problem: A calorimeter was calibrated with an electric heater, which supplied 22.5 kJ of energy as heat to the calorimeter and increased the temperature of the calorimeter and its water bath from 22.45°C to 23.97°C. What is the heat capacity of the calorimeter? How do you set up the equation for thi...
- Wed Jan 14, 2015 4:08 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: 7.9 Torr and atm conversions
- Replies: 1
- Views: 675
7.9 Torr and atm conversions
Problem: A gas in a cylinder was placed in a heater and gained 5500 kJ of energy as heat. If the cylinder increased in volume from 345 mL to 1846 mL against an atmospheric pressure of 750. Torr during this process, what is the change in internal energy of the gas in the cylinder? Could someone pleas...
- Sun Jan 11, 2015 12:18 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Problem 7.31- Energy Per Photon & Amount of Energy Needed to
- Replies: 4
- Views: 13988
Problem 7.31- Energy Per Photon & Amount of Energy Needed to
Problem: In a microwave oven, radiation is absorbed by water in the food and the food is heated. How many photons of wavelength 4.50 mm are required to heat 350. g of water from 25.0°C to 100.0°C, assuming all the energy is used to raise the temperature? How do I figure out the energy needed to heat...
- Wed Dec 10, 2014 8:47 pm
- Forum: *Titrations & Titration Calculations
- Topic: Fall 2012 Final, 7B
- Replies: 5
- Views: 1044
Re: Fall 2012 Final, 7B
Thank you.
Why is the chemical reaction set up with HCOO- as a reactant?
Why is the chemical reaction set up with HCOO- as a reactant?
- Wed Dec 10, 2014 7:43 pm
- Forum: *Titrations & Titration Calculations
- Topic: Fall 2012 Final, 7B
- Replies: 5
- Views: 1044
Fall 2012 Final, 7B
Problem: Calculate the pH at the stoichiometric point for the titration point for the titration of 15.00 mL of 0.100 M HCOOH (Ka=1.8 X 10^-4) with 0.150 M NaOH.
In calculating the pH at the stoichiometric point for the titration in this problem, can you explain how to get the volume of NaOH added?
In calculating the pH at the stoichiometric point for the titration in this problem, can you explain how to get the volume of NaOH added?
- Fri Nov 07, 2014 12:47 am
- Forum: Resonance Structures
- Topic: Most Important Resonance Structures
- Replies: 3
- Views: 893
Most Important Resonance Structures
Why is the 1st resonance structure the most important?
- Tue Oct 28, 2014 10:14 pm
- Forum: Electronegativity
- Topic: Ionic Character
- Replies: 5
- Views: 3751
Ionic Character
Which compound has bonds with greater ionic character and why: CO2 or CS2?
- Wed Oct 15, 2014 9:01 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: How To Calculate Number of Electrons in Orbitals
- Replies: 3
- Views: 886
How To Calculate Number of Electrons in Orbitals
How many electrons can occupy a) the 4p-orbitals? b) the 3d-orbitals? c) the 1s-orbital? d)the 4f-orbitals?
- Sat Oct 04, 2014 1:41 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: How To Predict Ground-State Configuration of a Bi atom
- Replies: 1
- Views: 3061
How To Predict Ground-State Configuration of a Bi atom
Predict the ground-state configuration of a Bismuth atom.
Can someone please show how to get the answer step by step?
Can someone please show how to get the answer step by step?