Biology and Chemistry Homework Help Forum

Post thread
Free Biology, Chemistry, Geology homework help via qualified mentors. Please use the template when requesting help and show your work. Gain understanding today!
Biology Equations governing cavitation, flow speed, and delta vapor pressure...
  • ellenb899
  • · Replies 22 ·
Replies
22
How does a Gas Chromatograph-Mass Spectrometer detect quantities?
  • BBChem42
  • · Replies 4 ·
Replies
4
Chemistry A confusion about conductance of weak electrolytes
  • nafisanazlee
  • · Replies 6 ·
Replies
6
Chemistry How Does Doubling Zinc Mass Affect Temperature Change in ZnO Formation?
  • cutielollipop
  • · Replies 3 ·
Replies
3
Chemistry How Do I Solve Non-Bonding Valence Electrons for Three Valent Oxygens?
  • pachsiisjj
  • · Replies 1 ·
Replies
1
Chemistry Calculate the pressure-volume work for the given reaction
  • anjauk2003
  • · Replies 3 ·
Replies
3
Chemistry Is this correct? A molar conversion for NAD+ at 50 micromolar concentration
  • Peterz
  • · Replies 1 ·
Replies
1
Biology Which organs/parts of the body are only functional on glucose?
  • physicisttobe
  • · Replies 5 ·
Replies
5
Review my simplified Lab instructions for Alum
  • MightyCatt
  • · Replies 5 ·
Replies
5
Chemistry Balancing formation of Perovskite solar cell components
  • Mayhem
  • · Replies 4 ·
Replies
4
Can a dry cell be made rechargeable?
  • Doriangrey
  • · Replies 10 ·
Replies
10
Chemistry How to understand hybridization in ##CH_3NNN##?
  • zenterix
  • · Replies 4 ·
Replies
4
Chemistry Electron Transitions after Absorption of Photon
  • jolly_math
  • · Replies 7 ·
Replies
7
Chemistry Electron Affinity: Adding Electrons to Valance Shells
  • SSG-E
  • · Replies 6 ·
Replies
6
Chemistry Understanding electronic configuration
  • Chijioke
  • · Replies 8 ·
Replies
8
Chemistry Understanding the concept of electron per shell
  • Chijioke
  • · Replies 5 ·
Replies
5
Chemistry Determination of the molecular structure of two organic compounds
  • Sommerfeld_01
  • · Replies 7 ·
Replies
7
Chemistry Why doesn't the formula of chlorine nitrate contain a positive charge?
  • zenterix
  • · Replies 9 ·
Replies
9
Chemistry How do we know ##BF_3## has Lewis structure but ##Al_2S_3## does not?
  • zenterix
  • · Replies 1 ·
Replies
1
Chemistry Chemical Equation Balance: NaNO3 + NaOH + Zn -> NH3 + Na2ZnO2 + H2O
  • Say17
  • · Replies 5 ·
Replies
5
Chemistry Find out the amount of the elements
  • Say17
  • · Replies 1 ·
Replies
1
Chemistry Predicting the electron domain and molecular geometries
  • Joe20
  • · Replies 2 ·
Replies
2
Chemistry Exercise about an aqueous solution (containing a halogen)
  • Ako9
  • · Replies 6 ·
Replies
6
What Is the Maximum Wavelength to Break the Weakest Bond in AsClF42-?
  • guiromero
  • · Replies 4 ·
Replies
4
Chemistry Valence Bond Theory: Energy of a system with H and Cl atoms
  • WMDhamnekar
  • · Replies 6 ·
Replies
6
Chemistry Hexagonal Packing Factor - Functional Molecules
  • VooDoo
  • · Replies 3 ·
Replies
3
Photoluminescence at lower temperature of carbazole
  • EL AALLAOUI Najla
  • · Replies 1 ·
Replies
1
Chemistry What Does Delta Gn Represent in the MIT Chemistry Course Equation?
  • guiromero
  • · Replies 2 ·
Replies
2
Chemistry Why is My Second-Order Reaction Rate Calculation Incorrect?
  • guiromero
  • · Replies 6 ·
Replies
6
Chemistry Reactions With Dilute Hydrochloric Acid
  • A13235378
  • · Replies 3 ·
Replies
3
Thermodynamics Question Regarding Gibbs Free Energy, Enthalpy, Entropy
  • aquastor
  • · Replies 1 ·
Replies
1
Chemistry Creating KF Molecule from Neutral Atoms: A Process of Ionization and Binding
  • zenterix
  • · Replies 2 ·
Replies
2
Biology Why do fatty acids burn in the presence of carbon?
  • physicisttobe
  • · Replies 1 ·
Replies
1
Biology What Happens When Ran GTPase Binds Tightly to GEF?
  • physicisttobe
  • · Replies 7 ·
Replies
7
How to get the structural formula of C3H6CI2?
  • chocolatte009911
  • · Replies 4 ·
Replies
4
Chemistry Finding the molecular formula of an unknown hydrocarbon
  • zachary570
  • · Replies 4 ·
Replies
4
Help is needed for converting units of a simple formula
  • han_123
  • · Replies 5 ·
Replies
5
Using 18% by weight ammonium hydroxide to make 16ppm aqueous solution
  • Frankenstein19
  • · Replies 2 ·
Replies
2
Chemistry Finding equilibrium expression for an equilibrium equation
  • haha0p1
  • · Replies 4 ·
Replies
4
Chemistry Derive an expression for mean free path from survival eqn exp(-x/λ)
  • P4Penguin
  • · Replies 5 ·
Replies
5
Chemistry How to compute specific surface energy for cubes of varying sizes?
  • Guilty_Way6122
  • · Replies 1 ·
Replies
1
Finding partial pressure at equilibrium
  • haha0p1
  • · Replies 5 ·
Replies
5
Chemistry Finding indicator for acid-base titration
  • haha0p1
  • · Replies 7 ·
Replies
7
Chemistry Mechanism for Solid-Phase Nucleic Acid Deprotection and Cleavage
  • physicisttobe
  • · Replies 2 ·
Replies
2
Chemistry Draw the mechanism of the reactions of steps 1 and 2
  • physicisttobe
  • · Replies 4 ·
Replies
4
Biology Understanding Allosteric & Competitive Enzyme Inhibitors
  • physicisttobe
  • · Replies 14 ·
Replies
14
Chemistry How Can XPS and ESR Determine Oxidation State in Coordination Compounds?
  • jolly_math
  • · Replies 5 ·
Replies
5
Chemistry How do I know whether a base is strong or not?
  • simphys
  • · Replies 2 ·
Replies
2
Chemistry Why is ethanol considered the parent chain in naming this benzene derivative?
  • jolly_math
  • · Replies 2 ·
Replies
2
Question about nucleotides and phosphoric acid
  • physicisttobe
  • · Replies 4 ·
Replies
4
Biology Calculating gradual chamber filling (CO2 displacing air)
  • Mahdivets
  • · Replies 5 ·
Replies
5
Chemistry Moles of NaOH to Create Buffer Solution pH=6 in 0.42M Ethanoic Acid
  • stunner5000pt
  • · Replies 3 ·
Replies
3
Chemistry Question about the Butler-Volmer equation in electrochemistry
  • Dishsoap
  • · Replies 1 ·
Replies
1
Chemistry MO Theory & OH: Bond Order & Nonbonding Electrons
  • jolly_math
  • · Replies 7 ·
Replies
7
Chemistry Why Does IF5 Exhibit a Square Pyramidal Shape Despite Exceeding the Octet Rule?
  • jolly_math
  • · Replies 1 ·
Replies
1
Chemistry Confusion in relation of Gibbs free energy and equilibrium constant
  • tbn032
  • · Replies 4 ·
Replies
4
Chemistry Units conversion for solution concentration
  • cheesycheese
  • · Replies 3 ·
Replies
3
Problem regarding vapour density of a mixture
  • tbn032
  • · Replies 5 ·
Replies
5
A K shell electron is ejected from a tungsten atom
  • tlrmaus
  • · Replies 4 ·
Replies
4
Chemistry Why NaCl Instead of 2NaCl in Reactions?
  • simphys
  • · Replies 10 ·
Replies
10
How are plantae protists similar and different from plant cells?
  • yahman
  • · Replies 2 ·
Replies
2
Biology Draw the genetic cross for the given pedigree
  • Tasha Clifford
  • · Replies 1 ·
Replies
1
Chemistry How can ideal gases be used to determine the change in enthalpy using Hess' law?
  • Tasha Clifford
  • · Replies 5 ·
Replies
5
Biology Sketch the change of pH in the breakdown of proteins into amino acids
  • FlyingWhale
  • · Replies 6 ·
Replies
6
Chemistry Where Did the 400g in Enthalpy Change of Neutralization Come From?
  • Iwanttolearnphysics
  • · Replies 3 ·
Replies
3
Chemistry Converting scfm to lb/hr, which density should I use?
  • Frankenstein19
  • · Replies 5 ·
Replies
5
Thermal Physics - Methane Fuel Cell
  • phil ess
  • · Replies 2 ·
Replies
2
Chemistry Convert 0.1 M Pyridine to mL: Easy Step-by-Step Guide
  • cheesycheese
  • · Replies 6 ·
Replies
6
Biology Huntington Disease Pedigree Problem
  • Sunwoo Bae
  • · Replies 2 ·
Replies
2
Calculating Molar Enthalpy of C2H4 Combustion w/ Hess's Law
  • XxphysicsxX
  • · Replies 3 ·
Replies
3
Chemistry Conformation Stability of Ethane-1,2-Diol
  • EnricoHendro
  • · Replies 1 ·
Replies
1
How Do Response Factors for Na and K Compare Using Li as an Internal Standard?
  • ssb
  • · Replies 1 ·
Replies
1
How to calculate the pI of a peptide?
  • DDS
  • · Replies 1 ·
Replies
1
Primary and secondary active transport, and passive transport?
  • nickname
  • · Replies 1 ·
Replies
1
Planar Concentration of Nb Atoms in BCC Crystal
  • elcotufa
  • · Replies 1 ·
Replies
1
Lewis structure, hybridization and VSEPR
  • extranice
  • · Replies 1 ·
Replies
1
Which Metal Should Be Used for Nickel Plating?
  • meganw
  • · Replies 1 ·
Replies
1
Chemistry What is the Correct Way to Prepare a 20% NaOH Solution?
  • Rajini
  • · Replies 19 ·
Replies
19
Esimating delta S and delta H from temp and Kb
  • chazgurl4life
  • · Replies 1 ·
Replies
1
Chemical equilibrium: Enthelpies and equilibrium contsants
  • Coastal
  • · Replies 1 ·
Replies
1
Hess's Law and Thermochemical Equations
  • djfrankym
  • · Replies 1 ·
Replies
1
Heat of Formation for Ammonium chloride
  • twilliams34
  • · Replies 1 ·
Replies
1
How Do You Calculate Thermodynamic Properties for Heated Water?
  • thechamp
  • · Replies 1 ·
Replies
1
Chemistry Which Box Has the Highest Pressure and Density?
  • chemistry4all
  • · Replies 1 ·
Replies
1
How Do You Calculate the Corrosion Rate of an Iron Sample?
  • FaNgS
  • · Replies 1 ·
Replies
1
The Iodination of Acetone lab- Need help with determining the reaction orders
  • crabapple11
  • · Replies 1 ·
Replies
1
Calculating Maximum Crater Diameter for an Asteroid Impact
  • scatterbrain8
  • · Replies 1 ·
Replies
1
Questions about % difference, inherent error, and % relative average difference.
  • crimsonn
  • · Replies 1 ·
Replies
1
Determining mutated, mRNA, Amino Acid sequence
  • sonyab523
  • · Replies 1 ·
Replies
1
Exact formula of tetra-amine-zinc complex
  • hyurnat4
  • · Replies 1 ·
Replies
1
Chemistry: Comparing the Rf values of carotene and lycopene?
  • madgab89
  • · Replies 1 ·
Replies
1
Difference between fibrous proteins and globular proteins
  • littlelady
  • · Replies 1 ·
Replies
1
Calculating Heat of NaOH Dissolution in Water
  • WahooMan
  • · Replies 1 ·
Replies
1
Diffusion/osmosis, mitosis, and cellular respiration
  • FlipStyle1308
  • · Replies 1 ·
Replies
1
Net ionic equations (NaOH; HCl; H2O)
  • berry2
  • · Replies 1 ·
Replies
1
Why Does ClNO2 Have Only One Double Bond in Its Lewis Structure?
  • JustinLiang
  • · Replies 1 ·
Replies
1
AP BIO: asexual and sexual reproduction
  • priscilla98
  • · Replies 1 ·
Replies
1
Chemistry Calculating Molar Solubility of CaCO3: A Puzzling Problem
  • samy4408
  • · Replies 7 ·
Replies
7
Chemistry Can Sulphonated Neatsfoot Oil Be Made Using Turkish Red Oil Method?
  • Oyster farmer
  • · Replies 12 ·
Replies
12
Chemistry How to measure the density of a material?
  • EL AALLAOUI Najla
  • · Replies 9 ·
Replies
9