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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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Why Does Crystallinity Affect Strength?

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

Replies: 1

Electrolysis Molten Metal Halides (Salts)

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

Replies: 1

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

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

Replies: 7

Chemistry What Is the Optimum Orientation of a Molecule?

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

Replies: 11

Can Sound Waves Help Us Understand the Clearing of Saltwater Solutions?

gdaigle
Dec 10, 2005 · Replies 2 · Dec 10, 2005

Replies: 2

Is This Cocaine Concentration Calculation Correct?

Scarpetta
Dec 10, 2005 · Replies 2 · Dec 10, 2005

Replies: 2

Mercury Battery Reaction: Determining the Oxidation Half Reaction

Math Is Hard
Dec 7, 2005 · Replies 4 · Dec 9, 2005

Replies: 4

Hydrostatic Balance: Forces Acting in Vertical & Horizontal Directions

sarahsbs
Dec 8, 2005 · Replies 1 · Dec 9, 2005

Replies: 1

What are some ideas for an acid-base reaction project in Anatomy class?

Vigo
Dec 7, 2005 · Replies 2 · Dec 9, 2005

Replies: 2

Why my answer is wrong? - remove electron from orbital

zhen
Dec 8, 2005 · Replies 6 · Dec 9, 2005

Replies: 6

Calculating Buffer Solution Volumes for pH 4.6 using Titration Virtual Lab

westdavi
Dec 7, 2005 · Replies 3 · Dec 9, 2005

Replies: 3

Chesmistry 12|VSEPER Problems|Quick Problems

Raza
Dec 8, 2005 · Replies 1 · Dec 9, 2005

Replies: 1

Still am having trouble with titration

westdavi
Dec 8, 2005 · Replies 1 · Dec 8, 2005

Replies: 1

Understanding 3D NMR HNCA Spectra: Identifying Peak Data and Arranging in Order

Allday
Dec 8, 2005 · Replies 2 · Dec 8, 2005

Replies: 2

Trying to determine if a molecule is polar or nonpolar

dnt
Dec 8, 2005 · Replies 1 · Dec 8, 2005

Replies: 1

What is the structure of Polychlorinated Biphenyls?

devilkidjin
Dec 6, 2005 · Replies 5 · Dec 8, 2005

Replies: 5

Hypothetical Air Circulation on Earth: Balancing Radiation and Its Impact

sarahsbs
Dec 8, 2005 · Replies 3 · Dec 8, 2005

Replies: 3

Forming Ionic & Covalent Bonds w/ Electron Dot Diagrams

mobb
Dec 7, 2005 · Replies 3 · Dec 8, 2005

Replies: 3

Why does the dissolution of NH4NO3 happen if the ∆H is 28.1?

ScienceMonkey
Dec 6, 2005 · Replies 1 · Dec 7, 2005

Replies: 1

How Do You Calculate the Rate Constant for a First Order Reaction?

helpimstuck
Dec 6, 2005 · Replies 1 · Dec 7, 2005

Replies: 1

Question about activation energy

helpimstuck
Dec 6, 2005 · Replies 1 · Dec 7, 2005

Replies: 1

Calculating Enthalpy for H3O: Investigating the Dissolution of Ammonium Nitrate

Jeann25
Dec 7, 2005 · Replies 5 · Dec 7, 2005

Replies: 5

Convert propylene glycol into pyruvate anaerobically

flythisforme
Dec 5, 2005 · Replies 1 · Dec 7, 2005

Replies: 1

Understanding Trans-2-Pentene: A Comprehensive Guide for Confused Individuals

devilkidjin
Nov 28, 2005 · Replies 2 · Dec 6, 2005

Replies: 2

What Concepts Should You Review Before a Chemistry Test?

AngelShare
Dec 5, 2005 · Replies 1 · Dec 5, 2005

Replies: 1

Preparing Cation Solutions Using Nitrates

extraordinarygirl
Dec 3, 2005 · Replies 2 · Dec 4, 2005

Replies: 2

What Happens to Ice at 0°C in a Vacuum Due to Vapor Pressure?

Stalker23
Dec 4, 2005 · Replies 2 · Dec 4, 2005

Replies: 2

Chemistry Sucralose molecule formula - help, please?

Math Is Hard
Dec 4, 2005 · Replies 2 · Dec 4, 2005

Replies: 2

Which Periodic Table Groups Form Soluble Anion and Cation Salts?

extraordinarygirl
Dec 4, 2005 · Replies 1 · Dec 4, 2005

Replies: 1

Pressure and Kinetic Energy of Gases

scorpa
Dec 3, 2005 · Replies 4 · Dec 4, 2005

Replies: 4

Calculate concentration of halfcell

m0286
Dec 3, 2005 · Replies 1 · Dec 3, 2005

Replies: 1

Chemistry Molecular Geometry: Discover the Fascinating World of Atoms and Bonding

force
Dec 3, 2005 · Replies 2 · Dec 3, 2005

Replies: 2

Where Can I Find Melting Points for These Semicarbazone Compounds?

JM00404
Dec 1, 2005 · Replies 2 · Dec 2, 2005

Replies: 2

How Do Copper, Iron, Aluminium, and Zinc Correlate in Properties and Uses?

nofx
Nov 29, 2005 · Replies 1 · Dec 2, 2005

Replies: 1

Erosion Control: Jetties vs Breakwaters vs Beach Renourishment & Dune Grasses

AngelShare
Nov 30, 2005 · Replies 1 · Nov 30, 2005

Replies: 1

Bohr's Intuition: How He Knew Angular Momentum Without Proof

shravan
Nov 28, 2005 · Replies 2 · Nov 30, 2005

Replies: 2

What is the difference between a fat cell and a lipid

GOD ENTITY
Nov 20, 2005 · Replies 5 · Nov 30, 2005

Replies: 5

Review My Essay: Pros & Cons of Grad School

Geekster
Nov 30, 2005 · Replies 3 · Nov 30, 2005

Replies: 3

Understanding Anions and Cations: Easy-to-Follow Guide for Chemistry Students

AngelShare
Nov 29, 2005 · Replies 2 · Nov 30, 2005

Replies: 2

Balancing Equations: Al + H2SO4 to Al3+ + SO42- + SO2 + H2O

mohlam12
Nov 28, 2005 · Replies 8 · Nov 29, 2005

Replies: 8

Chemistry Unsaturation are implied by the molecular formula C8H10ClNO?

useful_idiot
Nov 27, 2005 · Replies 2 · Nov 28, 2005

Replies: 2

Chemistry Help How to get the mole fraction ?

zhen
Nov 28, 2005 · Replies 3 · Nov 28, 2005

Replies: 3

NF3 Dipole: Understanding the Electron Distribution and Polarization

Stalker23
Oct 16, 2005 · Replies 7 · Nov 28, 2005

Replies: 7

Understanding Enthalpy of Reaction in the Thermite Reaction

forevergone
Nov 26, 2005 · Replies 3 · Nov 28, 2005

Replies: 3

Is Propiophenone an IUPAC Systematic Name?

Swatch
Nov 27, 2005 · Replies 1 · Nov 28, 2005

Replies: 1

Help with IUPAC: Count Unsaturation, Draw Structures

useful_idiot
Nov 27, 2005 · Replies 3 · Nov 28, 2005

Replies: 3

How Do Zinc Cofactors Enhance Enzyme Functionality in Carbonic Anhydrase?

vicki
Nov 27, 2005 · Replies 1 · Nov 27, 2005

Replies: 1

Colligative Properties of Nonelectrolyte Solutions

erik-the-red
Nov 24, 2005 · Replies 1 · Nov 24, 2005

Replies: 1

Calculate Heat Required for 28.5g Lead Increase from 15 to 37°C

Soaring Crane
Nov 23, 2005 · Replies 3 · Nov 24, 2005

Replies: 3

CO3- (2-) Ion: Resonance Structures

Soaring Crane
Nov 9, 2005 · Replies 2 · Nov 23, 2005

Replies: 2

Determine H for N2 + O2 -> 2NO with Given Information

Soaring Crane
Nov 21, 2005 · Replies 3 · Nov 23, 2005

Replies: 3

If you prepare 1/10 dilution of 10mg/ml

justfigureit
Nov 22, 2005 · Replies 2 · Nov 23, 2005

Replies: 2

Lead & Calorimetry: 3 Reasons Why & Possible Errors

chemistrygirl09
Nov 22, 2005 · Replies 6 · Nov 23, 2005

Replies: 6

What is the narrow-sense heritability of seed weight?

jena
Nov 22, 2005 · Replies 3 · Nov 23, 2005

Replies: 3

Difference Between Electron & Valence Shells - Explained

Ratzinger
Nov 22, 2005 · Replies 2 · Nov 23, 2005

Replies: 2

Calorimetry: Calculate Unknown Mass of Water

Soaring Crane
Nov 21, 2005 · Replies 2 · Nov 22, 2005

Replies: 2

Beer lambert equation and concentration

Scarpetta
Nov 21, 2005 · Replies 1 · Nov 21, 2005

Replies: 1

Chiral Compounds: Properties and Examples

eax
Nov 19, 2005 · Replies 9 · Nov 21, 2005

Replies: 9

Grade 8 Antarctica Assignment: Proving Special Flora & Fauna Adaptation

ShadowChaotic
Nov 15, 2005 · Replies 3 · Nov 21, 2005

Replies: 3

Balancing Redox Equations: Step-by-Step Guide for Beginners

Shay10825
Nov 19, 2005 · Replies 9 · Nov 20, 2005

Replies: 9

Chemistry How Do You Convert 2.95 mol of Ba(OH)2 to Atoms?

squares
Nov 19, 2005 · Replies 3 · Nov 20, 2005

Replies: 3

How Much Will the pH Change When Adding Acid to a Buffered Solution?

sunnyorange
Nov 20, 2005 · Replies 1 · Nov 20, 2005

Replies: 1

How Does the Clausius-Clapeyron Equation Derive the Slope -ΔHvap/RT?

courtrigrad
Nov 19, 2005 · Replies 5 · Nov 20, 2005

Replies: 5

Understanding the Redox Reaction of Lead Acetate in an Electrotic Cell

mrjeffy321
Nov 18, 2005 · Replies 2 · Nov 19, 2005

Replies: 2

Calculating Area Needed for One Year's Worth of MSW in US Landfills

physicsss
Nov 19, 2005 · Replies 1 · Nov 19, 2005

Replies: 1

Chemistry Which Nitrogen Oxide Has a Mass of 0.335g in 250mL?

Kandy
Nov 18, 2005 · Replies 5 · Nov 19, 2005

Replies: 5

What Is the Full Significance of the pH Scale?

Guillermo
Nov 17, 2005 · Replies 7 · Nov 19, 2005

Replies: 7

Are My Calculations for Gas Partial Pressures Correct?

DB
Nov 18, 2005 · Replies 5 · Nov 19, 2005

Replies: 5

Draw the Lewis structures for the reactants and products

Jeann25
Nov 18, 2005 · Replies 1 · Nov 18, 2005

Replies: 1

Cycles of Matter: Carbon-Oxygen Cycle & Photosynthesis/Respiration

ambzrose
Nov 15, 2005 · Replies 3 · Nov 17, 2005

Replies: 3

Plastics Questions: Answers for Year 8 Students

zap123
Nov 17, 2005 · Replies 1 · Nov 17, 2005

Replies: 1

How to Make a Chemistry Concept Map in Microsoft Word

AngelShare
Nov 17, 2005 · Replies 4 · Nov 17, 2005

Replies: 4

Is Work Negative When the Force is Opposite Direction of Motion?

shravan
Nov 16, 2005 · Replies 2 · Nov 17, 2005

Replies: 2

Help with percent concentration of hydrogen peroxide if diluted?

aisha
Nov 15, 2005 · Replies 3 · Nov 16, 2005

Replies: 3

Mastering Chemical Equilibrium: Chapter Review and Test Prep

intellekt
Nov 16, 2005 · Replies 1 · Nov 16, 2005

Replies: 1

What Is the Albedo of Leaves in Beef Cattle Pasture Production?

ambzrose
Nov 16, 2005 · Replies 1 · Nov 16, 2005

Replies: 1

Acid base titration problem. Need Help

ddluu
Nov 15, 2005 · Replies 1 · Nov 15, 2005

Replies: 1

Standard Heat of Formation Question

erok81
Nov 11, 2005 · Replies 6 · Nov 15, 2005

Replies: 6

Dipole Moment of Water: Explaining Its Ability to Solve Substances

Reshma
Nov 11, 2005 · Replies 3 · Nov 15, 2005

Replies: 3

Acid/Base Questions: True or False?

parwana
Nov 13, 2005 · Replies 2 · Nov 14, 2005

Replies: 2

Calculate the pH-value of a solution that does not contain water

broegger
Nov 13, 2005 · Replies 6 · Nov 14, 2005

Replies: 6

Lewis structure- and bases check please

jewilki1
Nov 10, 2005 · Replies 5 · Nov 14, 2005

Replies: 5

How do you write the net ionic equation for NaOH and HNO3?

hola
Nov 14, 2005 · Replies 1 · Nov 14, 2005

Replies: 1

Adapting the Donnan Equation for 3 Diffusible Ions

garytse86
Nov 14, 2005 · Replies 3 · Nov 14, 2005

Replies: 3

Nedd help with Friedel Crafts alkylation

Swatch
Nov 14, 2005 · Replies 4 · Nov 14, 2005

Replies: 4

Organic Chemistry Lab: Calculate NaBH4 Needed to Reduce Acetophenone

quarkboy
Nov 14, 2005 · Replies 2 · Nov 14, 2005

Replies: 2

Design an experiment to determine which reactant is the limiting reactant

extraordinarygirl
Nov 12, 2005 · Replies 5 · Nov 13, 2005

Replies: 5

But why is that?Why Doesn't Nitrogen Form NCl5?

Raza
Nov 7, 2005 · Replies 8 · Nov 13, 2005

Replies: 8

What is the RAM of carbon in a sample based on data from a mass spectrum?

123Sub-Zero
Oct 28, 2005 · Replies 1 · Nov 13, 2005

Replies: 1

Reducing Agents: H2, Cl2, I2, MnO4-, C

parwana
Nov 12, 2005 · Replies 1 · Nov 13, 2005

Replies: 1

Electrons on outer ring (transition metals)

dnt
Nov 9, 2005 · Replies 7 · Nov 12, 2005

Replies: 7

Balancing Redox Equations: Half Reaction Method

Soaring Crane
Nov 10, 2005 · Replies 2 · Nov 11, 2005

Replies: 2

Enthelpy change & lattice energy - check please

jewilki1
Nov 10, 2005 · Replies 1 · Nov 11, 2005

Replies: 1

Solving a Problem: Calculating Molar Fraction of Freon in a Tank

simonak
Nov 6, 2005 · Replies 3 · Nov 11, 2005

Replies: 3

Understanding Gas and Equilibrium: Can You Solve These Questions?

dekoi
Nov 6, 2005 · Replies 4 · Nov 11, 2005

Replies: 4

Ionic or covalent- check this please

jewilki1
Nov 10, 2005 · Replies 1 · Nov 10, 2005

Replies: 1

How Do Nuclear Power Plants and the Sun Generate Energy?

AngelShare
Nov 9, 2005 · Replies 3 · Nov 10, 2005

Replies: 3

Is (NH4)3PO4 Ionic or Covalent?

jewilki1
Nov 10, 2005 · Replies 1 · Nov 10, 2005

Replies: 1

What Role Do Buffers Play in Maintaining pH in Grade 7 Science?

njkid
Nov 8, 2005 · Replies 1 · Nov 10, 2005

Replies: 1

Why Are X and Y Chromosomes Placed Differently on Karyotype Charts?

jen333
Sep 18, 2005 · Replies 1 · Nov 9, 2005

Replies: 1

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Bio and Chem Homework Help

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