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!
Chemistry Where am I wrong in calculating the heat of reaction for CH4 + 2O2?
  • · Replies 6 ·
Replies
6
Views
2K
Chemistry How to Calculate Initial Concentrations of HOA and BCG?
  • · Replies 4 ·
Replies
4
Views
3K
Biology Chemical compounds that I can visualise
  • · Replies 2 ·
Replies
2
Views
2K
Chemistry Help with This for Finding Solutions
  • · Replies 3 ·
Replies
3
Views
2K
Chemistry Find the mass of one element of a sample
  • · Replies 7 ·
Replies
7
Views
4K
Chemistry How Does Electrolyte Type Influence Voltage in Galvanic Cells?
  • · Replies 6 ·
Replies
6
Views
3K
Chemistry Cleland Diagram & Binding Order from Lineweaver Burke Plots
  • · Replies 1 ·
Replies
1
Views
2K
Chemistry Bronsted-Lowery Help: Understanding HCOOH + CN- and H2O + HCO3- Reactions
  • · Replies 2 ·
Replies
2
Views
3K
Chemistry Processing a "Raw Spectrum" - A Beginner's Attempt
  • · Replies 17 ·
Replies
17
Views
3K
Chemistry Why Does Grignard Addition to Esters Form Ketones?
  • · Replies 5 ·
Replies
5
Views
2K
Biology Volume of substrate affecting enzyme activity
  • · Replies 10 ·
Replies
10
Views
4K
Chemistry Solving H2/Pd/C Reduction for #5 & #6 Questions
  • · Replies 6 ·
Replies
6
Views
3K
Chemistry Reduction of ester and amide with LiAlH4
  • · Replies 4 ·
Replies
4
Views
3K
Chemistry Use standard cell potentials to show that a catalyst can work
  • · Replies 9 ·
Replies
9
Views
3K
Chemistry Effect of temperature change in Le Chatelier's Principle
  • · Replies 2 ·
Replies
2
Views
2K
Chemistry Oxydation of cyclic enol with KMnO4
  • · Replies 4 ·
Replies
4
Views
2K
Chemistry Halogenation of an alcohol (iodation)
  • · Replies 1 ·
Replies
1
Views
1K
Biology Gel Electrophoresis of DNA fragments produced by apoptosis
  • · Replies 2 ·
Replies
2
Views
1K
Chemistry What is the purpose of redox reactions?
  • · Replies 18 ·
Replies
18
Views
5K
Chemistry Does anhydrous compound Penta-hydrate have mono- or tetra-hydrate forms?
  • · Replies 14 ·
Replies
14
Views
2K
Chemistry Calculate molar concentration of 500 cm^3 glucose solution with mass part 5%
  • · Replies 8 ·
Replies
8
Views
3K
Chemistry What is the basicity trend of organic compounds?
  • · Replies 2 ·
Replies
2
Views
2K
Chemistry Why is My Lattice Energy Calculation for PbCl2 Different from the Book's?
  • · Replies 2 ·
Replies
2
Views
3K
Chemistry Libermann's Nitroso test (of Amines)
  • · Replies 2 ·
Replies
2
Views
2K
Chemistry React Aniline w/ Br2: Mechanism & Desired Product
  • · Replies 3 ·
Replies
3
Views
2K
Maximum flame temperature during Combustion of CH4
  • · Replies 3 ·
Replies
3
Views
2K
Chemistry Beer Lambert problem, where did I go wrong?
  • · Replies 1 ·
Replies
1
Views
1K
H2F+ or CH3SH2+ which is more acidic by looking at the structures?
  • · Replies 3 ·
Replies
3
Views
6K
Chemistry Calculating the Volume of a 40% Solution
  • · Replies 10 ·
Replies
10
Views
4K
Chemistry Chemical Equilibrium: find concentration from 2 solutions (ICE table)
  • · Replies 3 ·
Replies
3
Views
2K
Having trouble deducing 4 organic structures (High school exam qn)
  • · Replies 5 ·
Replies
5
Views
2K
Biology Which method would be wrong to use for gene expression?
  • · Replies 2 ·
Replies
2
Views
2K
Chemistry Calculating the mass percent from a given volume % and density
  • · Replies 2 ·
Replies
2
Views
3K
Chemistry Help with Complex Acid-Base Titration
  • · Replies 1 ·
Replies
1
Views
2K
Chemistry Intermolecular forces between NO particles
  • · Replies 4 ·
Replies
4
Views
3K
Chemistry Are S2Cl2 and SCl the Same Thing?
  • · Replies 6 ·
Replies
6
Views
5K
Ionization vs. Dissociation for acids & bases
  • · Replies 6 ·
Replies
6
Views
18K
Chemistry Help with this interpolation (change in entropy while heating water)
  • · Replies 3 ·
Replies
3
Views
2K
Need help with practice MCAT question (acidit, basic or neutral?)
  • · Replies 2 ·
Replies
2
Views
4K
Chemistry Meso Syn Reaction Steriochemistry: Is Product B Meso?
  • · Replies 1 ·
Replies
1
Views
2K
How many stereoisomers does the compound PF3Cl2 have?
  • · Replies 4 ·
Replies
4
Views
3K
Looking for help with interpretation of FTIR transmission plot
  • · Replies 1 ·
Replies
1
Views
2K
Calculate time of solid passing through a liquid with the given values
  • · Replies 3 ·
Replies
3
Views
1K
Chemistry Calculate the half-life of the antibiotic Ofloxacin in this patient
  • · Replies 2 ·
Replies
2
Views
2K
Product at anode of the electrolysis of MgBr2
  • · Replies 6 ·
Replies
6
Views
9K
Chemistry Naming ethers: priority of alkyl substituent and ethoxy subsitutent
  • · Replies 1 ·
Replies
1
Views
2K
Chemistry Pinacol Rearrangement of asymmetrical diol
  • · Replies 1 ·
Replies
1
Views
2K
Biology Why do these biology textbooks write 'differential' as an adjective?
  • · Replies 8 ·
Replies
8
Views
2K
How Much Calcium Carbonate to Add for Optimal pH in a Fish Tank?
  • · Replies 3 ·
Replies
3
Views
2K
Chemistry Factors that determine acid strength
  • · Replies 1 ·
Replies
1
Views
2K
Ans: Resonance Structures: Checking Answers Correctness
  • · Replies 7 ·
Replies
7
Views
2K
Chemistry Why Does UV Light Have More Energy Than Visible Light in an Emission Spectrum?
  • · Replies 3 ·
Replies
3
Views
2K
Chemistry Vapor pressure of ethanoic acid vs. ethanol
  • · Replies 1 ·
Replies
1
Views
2K
Chemistry PH Indicator and Endpoint Observations
  • · Replies 3 ·
Replies
3
Views
2K
Chemistry Calculating Kp of o2 and o3 equilibrium
  • · Replies 3 ·
Replies
3
Views
4K
Chemistry Citric acid polyprotic acid equilibria
  • · Replies 1 ·
Replies
1
Views
3K
Chemistry Decomposition of C5H6O3 equilibrium
  • · Replies 1 ·
Replies
1
Views
3K
Chemistry Why does evaporating water cause some water to be cooled and form ice?
  • · Replies 3 ·
Replies
3
Views
2K
Chemistry Work, temperature and energy in a constant pressure process
  • · Replies 4 ·
Replies
4
Views
2K
Chemistry What is the Correct Formula of the Metal?
  • · Replies 4 ·
Replies
4
Views
2K
Chemistry Choosing an appropriate base for deprotonation
  • · Replies 14 ·
Replies
14
Views
4K
Chemistry Determine the quality/moisture of the vapor/water mixture
  • · Replies 4 ·
Replies
4
Views
2K
Chemistry Expanding and Naming of Abbreviated Chemical Formulas
  • · Replies 1 ·
Replies
1
Views
2K
Biology Duration of Action of a drug treatment
  • · Replies 8 ·
Replies
8
Views
2K
Biology Pharmacokinetics: Volume of Distribution and Total Body Clearance
  • · Replies 3 ·
Replies
3
Views
2K
Chemistry Why is Understanding Wedge-Dash Diagrams Important for Visualizing Molecules?
  • · Replies 3 ·
Replies
3
Views
4K
Chemistry Assumptions made when doing calorimetry / errors that occur
  • · Replies 7 ·
Replies
7
Views
8K
Chemistry How Do I Find the Molar Enthalpy Change for Reactions 2 and 3?
  • · Replies 10 ·
Replies
10
Views
3K
Chemistry Understanding the Mechanism of E1 Reaction on Levosalbutamol
  • · Replies 3 ·
Replies
3
Views
2K
Chemistry Why Is Methylation of Glucose Considered Nucleophilic Substitution?
  • · Replies 2 ·
Replies
2
Views
2K
Chemistry Drawing 1-bromo-6-chlorodispiro [2.1.2^5.1^3] octane
  • · Replies 1 ·
Replies
1
Views
2K
Chemistry Carbocation Stability: Attracting Inductive vs Mesomeric Effects
  • · Replies 2 ·
Replies
2
Views
2K
Chemistry Calculation Error: 0.19 = (0.14 - 0.13) - 0.06/2*log(1/(0.1*[Pb2+]))
  • · Replies 2 ·
Replies
2
Views
2K
Chemistry Pressure of gasoline in a closed container
  • · Replies 1 ·
Replies
1
Views
2K
Biology How Do Stoichiometric Coefficients Affect Reaction Rates?
  • · Replies 3 ·
Replies
3
Views
2K
Identity of metal from electrolysis
  • · Replies 3 ·
Replies
3
Views
3K
Chemistry PKb of weak base titrated with strong acid
  • · Replies 1 ·
Replies
1
Views
3K
Chemistry CO2 and H2CO3 Concentrations in Aqueous Solution: Understanding the Relationship
  • · Replies 2 ·
Replies
2
Views
2K
Chemistry Melting and boiling points of titanium tetrahalides
  • · Replies 5 ·
Replies
5
Views
4K
Chemistry Platinum ion electron configuration
  • · Replies 1 ·
Replies
1
Views
2K
Chemistry Isomers of tert-butylnitrobenzene
  • · Replies 2 ·
Replies
2
Views
2K
Chemistry C-H bond enthelpy of halogenated hydrocarbons
  • · Replies 2 ·
Replies
2
Views
2K
Chemistry Are there alternative hydrogen abstraction pathways in E2 elimination reactions?
  • · Replies 1 ·
Replies
1
Views
1K
Biology Biochemistry Glycolysis/Gluconeogenesis
  • · Replies 1 ·
Replies
1
Views
2K
Chemistry Carbocations Stability: Compare 2 & 3 for Electron Induction
  • · Replies 2 ·
Replies
2
Views
2K
Determine energy state difference using absorption-emission spectra
  • · Replies 3 ·
Replies
3
Views
3K
Chemistry Decomposition of Sucrose: Understanding the Rate and Order of Reaction
  • · Replies 3 ·
Replies
3
Views
2K
Chemistry What is the rate law for the reaction of NO and H2?
  • · Replies 1 ·
Replies
1
Views
2K
Chemistry What is the relationship between temperature and reaction rate?
  • · Replies 1 ·
Replies
1
Views
2K
Chemistry How Does Adding Water Affect the Equilibrium in Le Chatelier's Principle?
  • · Replies 8 ·
Replies
8
Views
5K
Chemistry Reaction Mechanism of Cl2 and CHCl3
  • · Replies 1 ·
Replies
1
Views
2K
Chemistry Need Help with Bond Length Calculations of Acetylene
  • · Replies 7 ·
Replies
7
Views
3K
Chemistry Equilibrium of Methanol Vapor Decomposition
  • · Replies 2 ·
Replies
2
Views
2K
Biology What Are the Types of Error When Taking an EEG?
  • · Replies 2 ·
Replies
2
Views
2K
Chemistry Finding rate constant from pressure change in an experiment
  • · Replies 2 ·
Replies
2
Views
2K
Biology Iodine 131 for hyperthyroidism (β- disintegration)
  • · Replies 1 ·
Replies
1
Views
1K
Biology Ames Test: Understanding Mutations and Lethality
  • · Replies 5 ·
Replies
5
Views
2K
Biology Prokaryote DNA replication subunits
  • · Replies 2 ·
Replies
2
Views
1K
Biology How Does the CTD of RNA Polymerase in Eukaryotes Affect Transcription?
  • · Replies 2 ·
Replies
2
Views
2K
Chemistry Adding sugar to water; water level doesn't go back to the original volume
  • · Replies 4 ·
Replies
4
Views
2K