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Biology and Chemistry Homework Help Forum

Free Biology, Chemistry, Geology homework help via qualified mentors. Please use the template when requesting help and show your work. Gain understanding today!

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What is Hybridization and How Can It Be Calculated Using a Simple Technique?

Jan 30, 2006 · Replies 7 · Feb 3, 2006

Replies: 7

Views: 3K

How to Calculate Argon Atom Energy Fractions and Reaction Rates?

Feb 1, 2006 · Replies 10 · Feb 2, 2006

Replies: 10

Views: 6K

Chemistry Molar Mass of Unknown Solute and Mole Fraction of Gases

Jan 27, 2006 · Replies 7 · Feb 2, 2006

Replies: 7

Views: 25K

What Does NaOH(aq) Mean?

Jan 30, 2006 · Replies 12 · Feb 2, 2006

Replies: 12

Views: 2K

What Is the Molarity of an Isotonic Saline Solution?

Jan 28, 2006 · Replies 2 · Feb 1, 2006

Replies: 2

Views: 6K

Ions Table: Find the Perfect Resource for Your Chemistry Needs

Feb 1, 2006 · Replies 2 · Feb 1, 2006

Replies: 2

Views: 16K

What Happens When CBr4 Reacts with 1-Butene in the Presence of Peroxides?

Jan 29, 2006 · Replies 6 · Jan 30, 2006

Replies: 6

Views: 3K

Formation of Bromocyclopentane from Br2 and 1-Methylcyclopentane

Jan 29, 2006 · Replies 4 · Jan 30, 2006

Replies: 4

Views: 3K

Chemistry Comparing Boiling Pts of Bromine & Iodine Monochloride - Intermolecular Forces

Jan 28, 2006 · Replies 2 · Jan 29, 2006

Replies: 2

Views: 11K

Discover the Importance of Acid and Base Testing: Practical Applications

Jan 21, 2006 · Replies 2 · Jan 29, 2006

Replies: 2

Views: 3K

Calculating pH of Strong and Weak Acids with 10^-7 M Concentration - Explained

Jan 29, 2006 · Replies 3 · Jan 29, 2006

Replies: 3

Views: 2K

Does OH Group Have Lowest Coefficient When Naming Alcohol?

Jan 22, 2006 · Replies 2 · Jan 29, 2006

Replies: 2

Views: 5K

Calculating pH and Ionization of Aspirin Solutions

Jan 21, 2006 · Replies 3 · Jan 29, 2006

Replies: 3

Views: 6K

How would you determine K for the following reaction

Jan 26, 2006 · Replies 5 · Jan 29, 2006

Replies: 5

Views: 3K

Chemistry Solving Unknown Metal Moles in Chemistry Exam

Jan 28, 2006 · Replies 3 · Jan 28, 2006

Replies: 3

Views: 6K

Understanding the Precision vs. Accuracy of Spectrofluorimeters

Jan 26, 2006 · Replies 7 · Jan 27, 2006

Replies: 7

Views: 10K

Chemistry Calculating Atoms & Molecules in H20 - Is It Correct?

Jan 27, 2006 · Replies 1 · Jan 27, 2006

Replies: 1

Views: 4K

How Can You Determine If an Alkyloxonium Ion Will Lose Water Readily?

Jan 26, 2006 · Replies 1 · Jan 27, 2006

Replies: 1

Views: 6K

How Do Vacant d-Orbitals Facilitate the Formation of Transition Metal Complexes?

Jan 27, 2006 · Replies 1 · Jan 27, 2006

Replies: 1

Views: 3K

Find Osmolarity of Potato Cores | Lab Tips

Jan 20, 2006 · Replies 7 · Jan 27, 2006

Replies: 7

Views: 47K

Limits of detection/decision/determination

Jan 24, 2006 · Replies 2 · Jan 26, 2006

Replies: 2

Views: 4K

Question about equilibrium constant

Jan 25, 2006 · Replies 4 · Jan 26, 2006

Replies: 4

Views: 6K

Why Use Interpolation Over Extrapolation for Calibration Curves?

Jan 25, 2006 · Replies 4 · Jan 25, 2006

Replies: 4

Views: 15K

Help with Civil Engineering Chemistry Homework

Jan 25, 2006 · Replies 1 · Jan 25, 2006

Replies: 1

Views: 2K

Smallest Heat of Combustion: Cyclopentane

Jan 22, 2006 · Replies 6 · Jan 23, 2006

Replies: 6

Views: 8K

How do chemists measure electronegativity?

Jan 23, 2006 · Replies 1 · Jan 23, 2006

Replies: 1

Views: 5K

What is the most stable conformation of trans-1-tert-butyl-4-methylcyclohexane?

Jan 21, 2006 · Replies 2 · Jan 22, 2006

Replies: 2

Views: 4K

Are These Statements About Osmosis, Solutes, and Solvents Correct?

Jan 20, 2006 · Replies 1 · Jan 22, 2006

Replies: 1

Views: 12K

Why Are Fatty Acids Classified as Acids Despite Producing OH- Ions?

Jan 21, 2006 · Replies 1 · Jan 22, 2006

Replies: 1

Views: 22K

Which Iron Ion Is Truly More Stable, Fe2+ or Fe3+?

Jan 21, 2006 · Replies 4 · Jan 21, 2006

Replies: 4

Views: 23K

Calculating Empirical Formula Using Molecular Mass

Jan 21, 2006 · Replies 3 · Jan 21, 2006

Replies: 3

Views: 7K

1st order, 2nd order Rate reactions HELP

Jan 11, 2006 · Replies 5 · Jan 20, 2006

Replies: 5

Views: 25K

Fuel Cell Project: Resources and Info

Jan 17, 2006 · Replies 2 · Jan 17, 2006

Replies: 2

Views: 2K

Help me understand what a Chromosome and Protein is

Jan 15, 2006 · Replies 4 · Jan 17, 2006

Replies: 4

Views: 8K

Concentration of Ions in Ba(OH)2 + NiSO4 Reaction

Jan 14, 2006 · Replies 3 · Jan 16, 2006

Replies: 3

Views: 3K

What's the difference between an isomer and constitutional isomer?

Jan 15, 2006 · Replies 2 · Jan 16, 2006

Replies: 2

Views: 3K

Singing about Oil: Finding the Right Words

Jan 11, 2006 · Replies 4 · Jan 14, 2006

Replies: 4

Views: 7K

Water Interactions, Moderation, and Cohesion in Nature Explained

Jan 12, 2006 · Replies 4 · Jan 13, 2006

Replies: 4

Views: 3K

Answers to Hard Questions for Ridiculously Difficult Extra Credit

Jan 12, 2006 · Replies 1 · Jan 13, 2006

Replies: 1

Views: 5K

What Are the Key Differences Between Ionic and Covalent Bonds?

Jan 7, 2006 · Replies 4 · Jan 12, 2006

Replies: 4

Views: 5K

Identify Primary Consumer in Waters off Coast of Peru

Jan 11, 2006 · Replies 1 · Jan 11, 2006

Replies: 1

Views: 3K

Calculate Specific Heat of Silver: Step-by-Step Guide

Jan 6, 2006 · Replies 12 · Jan 11, 2006

Replies: 12

Views: 27K

Does anyone know what fish eat if they don't have teeth?

Dec 31, 2005 · Replies 8 · Jan 11, 2006

Replies: 8

Views: 4K

How to test if some unknowns are covalent or ionic?

Jan 10, 2006 · Replies 3 · Jan 10, 2006

Replies: 3

Views: 108K

Reaction of Mg with acids (molat enthelpy and rate of reaction)

Jan 10, 2006 · Replies 1 · Jan 10, 2006

Replies: 1

Views: 15K

Why Don't Carboxylic Acids Have Double Bonds in Their Parent Chains?

Jan 9, 2006 · Replies 3 · Jan 10, 2006

Replies: 3

Views: 11K

What is the economic significance of carboxylic acids?

Jan 6, 2006 · Replies 4 · Jan 9, 2006

Replies: 4

Views: 3K

Naming Alkanes: CH3CH(CH3)CH3CH(CH2CH3)CH(CH3)CH3

Jan 5, 2006 · Replies 7 · Jan 9, 2006

Replies: 7

Views: 18K

What Are the Key Concepts of Heat, Temperature, and Thermodynamics?

Jan 8, 2006 · Replies 2 · Jan 8, 2006

Replies: 2

Views: 2K

What Is an Empirical Formula in Chemistry?

Jan 8, 2006 · Replies 1 · Jan 8, 2006

Replies: 1

Views: 3K

Vagus Nerve & Acetylcholine: Lowering Heart Rate

Jan 6, 2006 · Replies 2 · Jan 7, 2006

Replies: 2

Views: 7K

Hydrochloric Acid & Marble Chips (CaCO3)

Dec 22, 2005 · Replies 3 · Jan 6, 2006

Replies: 3

Views: 30K

Does Bromobenzene Indicate Bromine on Every Carbon in the Benzene Ring?

Jan 5, 2006 · Replies 3 · Jan 5, 2006

Replies: 3

Views: 3K

How Do You Calculate the Production Rates of P4 and H2 in a Chemical Reaction?

Jan 4, 2006 · Replies 2 · Jan 4, 2006

Replies: 2

Views: 8K

Is My Net Ionic Equation for Sulfur Trioxide and Carbon Dioxide Correct?

Jan 3, 2006 · Replies 2 · Jan 3, 2006

Replies: 2

Views: 3K

Calculating Proportion of Radioactive DNA After Replication

Jan 1, 2006 · Replies 6 · Jan 3, 2006

Replies: 6

Views: 3K

Mitosis at Telophase: Decreasing Cells

Dec 30, 2005 · Replies 3 · Jan 3, 2006

Replies: 3

Views: 2K

How can we determine the age of ancient substances using radiocarbon dating?

Dec 29, 2005 · Replies 3 · Jan 1, 2006

Replies: 3

Views: 6K

Understanding Florida's Phytoplankton: Types, Sicknesses, and Outbreaks

Dec 29, 2005 · Replies 2 · Dec 31, 2005

Replies: 2

Views: 7K

Questions about dative covalent bond and complexes

Dec 13, 2005 · Replies 4 · Dec 30, 2005

Replies: 4

Views: 9K

What Factors Influence Phytoplankton Growth?

Dec 25, 2005 · Replies 9 · Dec 30, 2005

Replies: 9

Views: 4K

Chemistry coursework, identifying unknown chemicals

Dec 29, 2005 · Replies 3 · Dec 29, 2005

Replies: 3

Views: 11K

Electrode Potentials and Complexing

Dec 20, 2005 · Replies 16 · Dec 27, 2005

Replies: 16

Views: 7K

Friend with Hepatitis B and Cold Body Symptoms

Dec 24, 2005 · Replies 1 · Dec 24, 2005

Replies: 1

Views: 4K

Digestive Secretion pH: 8-9.0 Effects

Dec 22, 2005 · Replies 1 · Dec 23, 2005

Replies: 1

Views: 4K

Name Geometric Shapes Based on Lewis Dot Drawings

Dec 21, 2005 · Replies 13 · Dec 23, 2005

Replies: 13

Views: 21K

How to Calculate the pH of a Buffer Solution After Adding HCl?

Dec 22, 2005 · Replies 3 · Dec 23, 2005

Replies: 3

Views: 8K

How can you prepare a chromatogram that shows the separation of the red pigment?

Dec 21, 2005 · Replies 2 · Dec 22, 2005

Replies: 2

Views: 6K

Why Does Starch Taste Sweeter When Chewed?

Dec 22, 2005 · Replies 2 · Dec 22, 2005

Replies: 2

Views: 3K

Calculating Temperature Increase from Energy Produced by a 60-Watt Bulb

Dec 21, 2005 · Replies 3 · Dec 21, 2005

Replies: 3

Views: 3K

How many times more soluble. HELP

Dec 19, 2005 · Replies 14 · Dec 20, 2005

Replies: 14

Views: 4K

HELP solubility product determine solubility of lead 2 chloride mol/L and g/L

Dec 19, 2005 · Replies 2 · Dec 20, 2005

Replies: 2

Views: 14K

Chemistry Compound vs Molecule: What's the Difference?

Dec 19, 2005 · Replies 1 · Dec 19, 2005

Replies: 1

Views: 3K

Calculations of Solubility Product of Lead 2 Chloride

Dec 18, 2005 · Replies 1 · Dec 18, 2005

Replies: 1

Views: 10K

Hess' Law Calculation for Reaction A: \Delta H = 121 kJ | Reference Table Used

Dec 18, 2005 · Replies 2 · Dec 18, 2005

Replies: 2

Views: 2K

Understanding Enthalpy: Doubling Equations and Changes in kJ/mol

Dec 18, 2005 · Replies 3 · Dec 18, 2005

Replies: 3

Views: 4K

Why Is Co2+ Pink?

Dec 13, 2005 · Replies 6 · Dec 18, 2005

Replies: 6

Views: 4K

Naming Organic Compounds: IUPAC Naming

Dec 12, 2005 · Replies 5 · Dec 17, 2005

Replies: 5

Views: 6K

Make a superhero with the chemical neon

Dec 10, 2005 · Replies 9 · Dec 17, 2005

Replies: 9

Views: 9K

Can You Sing About How Oil is Formed and Extracted?

Dec 14, 2005 · Replies 6 · Dec 16, 2005

Replies: 6

Views: 7K

Is Kevlar Really Flexible Despite Being a Crystalline Polymer?

Dec 11, 2005 · Replies 2 · Dec 16, 2005

Replies: 2

Views: 10K

What is the pH of NaOH & H2SO4 Mixture?

Dec 10, 2005 · Replies 9 · Dec 16, 2005

Replies: 9

Views: 6K

What's the insulating in houses made out of?

Dec 15, 2005 · Replies 2 · Dec 15, 2005

Replies: 2

Views: 2K

Understanding Entropy: A Comprehensive Explanation for Beginners

Dec 14, 2005 · Replies 5 · Dec 15, 2005

Replies: 5

Views: 3K

Where can I find chemical equations for Thorium?

Dec 13, 2005 · Replies 2 · Dec 15, 2005

Replies: 2

Views: 4K

How Much CO2 Was Produced in the Respiration Experiment?

Dec 10, 2005 · Replies 1 · Dec 15, 2005

Replies: 1

Views: 3K

Temperature in Space: Is There Really None?

Dec 14, 2005 · Replies 3 · Dec 14, 2005

Replies: 3

Views: 3K

Calculate Formal Charge of Chlorine in HClO3

Dec 8, 2005 · Replies 6 · Dec 14, 2005

Replies: 6

Views: 14K

Finding BrF5 Molecular Orbital Diagram

Dec 14, 2005 · Replies 1 · Dec 14, 2005

Replies: 1

Views: 7K

Help Needed: Titration Curves - pH & H+ Calculation

Dec 8, 2005 · Replies 2 · Dec 13, 2005

Replies: 2

Views: 4K

What are the properties of Polychlorinated Biphenyl (PCB)?

Dec 11, 2005 · Replies 4 · Dec 13, 2005

Replies: 4

Views: 5K

How Do I Calculate Se Concentration from Multiple Calibration Curves?

Dec 12, 2005 · Replies 1 · Dec 13, 2005

Replies: 1

Views: 5K

Explaining the Catalysis of SN2 Reactions by Iodide Ions

Dec 8, 2005 · Replies 5 · Dec 13, 2005

Replies: 5

Views: 15K

What Makes Kevlar Highly Heat Resistant?

Dec 10, 2005 · Replies 3 · Dec 13, 2005

Replies: 3

Views: 9K

Help with Polychlorinated Biphenyl Properties

Dec 11, 2005 · Replies 1 · Dec 11, 2005

Replies: 1

Views: 2K

Biology post-glomular blood question

Dec 8, 2005 · Replies 2 · Dec 11, 2005

Replies: 2

Views: 3K

Why Does Crystallinity Affect Strength?

Dec 11, 2005 · Replies 1 · Dec 11, 2005

Replies: 1

Views: 3K

Electrolysis Molten Metal Halides (Salts)

Dec 10, 2005 · Replies 1 · Dec 11, 2005

Replies: 1

Views: 8K

Chemistry Calculating the Percent of Cytosine in a DNA Molecule with 28% Thymine

Dec 6, 2005 · Replies 7 · Dec 10, 2005

Replies: 7

Views: 22K

Chemistry What Is the Optimum Orientation of a Molecule?

Dec 9, 2005 · Replies 11 · Dec 10, 2005

Replies: 11

Views: 2K

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