Biology and Chemistry Homework Help Forum

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Biology What is the genotype with lowest frequency?
  • TytoAlba95
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Biology How Can Dry Seeds Still Germinate After Long Periods of Desiccation?
  • musicgold
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10
Chemistry Investigating dsp2 & sp3 Configurations in Ni2+ Complexes
  • Gourab_chill
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Calculations involving acids and bases
  • sergey_le
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4
Chemistry What causes the release of ammonia in organic compounds?
  • Gourab_chill
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10
Chemistry Solving Ionic Equilibrium Problem: Volume of HCl & Reaction Explained
  • Prabs3257
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Chemistry Solving for electron activity given pH and ratio of redox elements
  • peeballs
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Chemistry Stability of the derivatives of cyclopropyl methyl carbocation
  • Physics lover
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4
Chemistry What are the partial pressures of each gas in the mixture?
  • ianc1339
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16
Chemistry Is bronze tarnish electrochemical corrosion or chemical corrosion?
  • Yeahaight
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Chemistry Equilibrium temperature of a water and ice system
  • il postino
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4
Chemistry Conversion of Orthophosphoric acid to Pyro and Meta Phosphoric acid
  • Physics lover
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5
Chemistry Reasons for Increasing the Inductive Effect
  • Crystal037
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16
Chemistry What Is the Final Product of Bromination and Cyanation of Phenyl Ethane?
  • Physics lover
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Chemistry Ring contraction in a diazotisation reaction
  • Physics lover
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18
Chemistry Solving pH Changes: Adding Acid to a Buffer or Water
  • Fig Neutron
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16
Chemistry Newman projections of meso-2,3-butanediol
  • Physics lover
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15
Chemistry Tollens' test on Alpha hydroxy ketones
  • Prabs3257
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1
Chemistry Reacting an Ester: Seeking Approval - Do You Agree?
  • HighFive5
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3
Chemistry Can a Solution Have a Concentration Greater Than 100%?
  • il postino
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3
Chemistry Does Decarboxylation Occur in Gamma-Keto Acids Under Heat?
  • HighFive5
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Chemistry Ester Formation Reaction: Electron Pushing Analysis
  • HighFive5
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Chemistry Identifying the mistake in this reaction scheme to form 2-hydroxyisobutyramide
  • etotheipi
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6
Chemistry Reaction Mechanism for Amide Formation: Do You Agree?
  • HighFive5
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2
Chemistry Why does a negative ΔH indicate an exothermic reaction?
  • cookiemnstr510510
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2
Chemistry Acidity of H2O vs H2S: Formal Charge vs Electronegativity
  • PhysicsCanuck
  • · Replies 18 ·
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18
Chemistry Structural formulas & optical activity
  • PhysicsCanuck
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1
Chemistry How Can Isoxazole Be Synthesized from Furoxan and Phenylacetylene?
  • Natalie456
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Chemistry Understanding Bonding Energy in Water for Electrolysis Calculations
  • tommyhp2
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Chemistry Finding the pH of this acid and its sodium salt solution
  • Kaushik
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7
Chemistry Need help determining the correct equation
  • katiemager
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2
Chemistry Is the Solution Manual's Approach to Internal Energy Calculation Accurate?
  • r12214001
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Equilibrium in a system containing I2 and I
  • Kaushik
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Chemistry Calculating the bonding energy between two ions
  • jisbon
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27
Chemistry Complex ion oxidation state (with pic)
  • r12214001
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7
Chemistry Is Pseudobuffering in High-Concentration Ammonia Solutions Significant?
  • r12214001
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Chemistry Calculating delta H of reaction using bond energies?
  • needhelpwithchem
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Chemistry Constant Volume Heat of Combustion from heat capacity of calorimeter
  • aruhland
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Chemistry Calculate Qv from Qp: deltaH and deltaU
  • aruhland
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Chemistry Calculating the volume of individual solution(s) [Mole/Atoms Concept]
  • jisbon
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Chemistry Integrated rate law homework equations Gen Chem II
  • DMB
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Chemistry Naming Ionic Compounds: Iron (III) Oxide
  • rachelmaddiee
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Chemistry Calculating Number of Moles & Ions in CaCI2
  • rachelmaddiee
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Chemistry Converting the number of atoms to the mass of an element
  • rachelmaddiee
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Chemistry Converting 100 Yards to Centimeters: Dimensional Analysis Explained
  • rachelmaddiee
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Chemistry CH2O Lewis Structure: Verifying the Correctness
  • rachelmaddiee
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Chemistry Cation-Anion Combination: Mg2+ & O2- = MgO
  • rachelmaddiee
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Chemistry How Does MgO Form?
  • rachelmaddiee
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Chemistry Calculating Compound Proportions: Nitrogen and Oxygen Mass Percentages
  • rachelmaddiee
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Chemistry Determining Moles and Particles from Mass of a Compound
  • rachelmaddiee
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Chemistry Find Empirical Formula of Unknown Substance
  • rachelmaddiee
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Chemistry Nitrogen: Atomic Number 7 & Electron Configuration
  • rachelmaddiee
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What will be the product of this organic reaction?
  • Adesh
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Chemistry Equilibrio of a sparingly soluble ionic compound
  • daphnelee-mh
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Chemistry Understanding Acid Ionization Constant: Basics and Applications
  • r12214001
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Chemistry BCA tables and Stoichiometry worksheet
  • Grace_314
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Chemistry Adjust the volume to maximize the product yield
  • daphnelee-mh
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Chemistry What determines the direction of a reaction under standard state conditions?
  • daphnelee-mh
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Chemistry Molecular Shape of BF3: Trigonal Planar or Pyramidal?
  • daphnelee-mh
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Chemistry Relationship between chemical equilibrium and rate equilibrium
  • r12214001
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Chemistry Solve Log Rate Law Problem | Step-by-Step Guide for Optimal Results
  • r12214001
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Biology Estimating pH Without [H+][A-]: Is There Another Way?
  • TytoAlba95
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Biology Solubility of protein in supernatant
  • TytoAlba95
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Chemistry How to Calculate the Percent Weight of Components in a Gas Mixture?
  • archaic
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Biology Genetics Probability (Autosomal Recessive)
  • protractor
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Chemistry How Does Hydrogen Donate a Proton with Only One?
  • Witcher
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Chemistry Is the N Factor of Oxalic Acid in Titration Correctly Applied?
  • Prabs3257
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Reaction rate, rate equation and half life
  • Sabra_a
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Chemistry Balancing Redox Reaction: FeS2+Na2O2→Na2FeO4+Na2SO4+Na2O"
  • DottZakapa
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Chemistry HF MO: Why F Uses 2P for Bonding in HF Molecular Orbital Model
  • r12214001
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Chemistry Equilibrium of a Sparingly Soluble Ionic Compound
  • daphnelee-mh
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5
Chemistry Attack on Epoxide: What Did I Do Wrong?
  • Prabs3257
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Chemistry Determining the concentration of ions in ppm
  • rwooduk
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8
Chemistry Calculating Hybridisation and Existence of a Compound with Boron
  • Physics lover
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7
Chemistry How to Synthesize Alkenes Using Corey House Reaction?
  • Physics lover
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10
Chemistry Computation of Liquid/Vapor Result during a Volume Expansion
  • Bcavender
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7
Chemistry Why do we say that the concentration of solids and liquids are constant?
  • Adesh
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11
Chemistry How can oxidation numbers be used to balance chemical equations?
  • Witcher
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4
Chemistry No. of stereoisomers in aldol condensation
  • Physics lover
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4
Frontier Molecular Orbital Theory Problem
  • cookiemnstr510510
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Chemistry How is Methyl Propanoate Formed from Propanoyl Chloride and Sodium Methoxide?
  • charlie05
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Chemistry Calculate the Enthropy Change of Isothermal Expansion of a Non-Ideal Gas
  • Ignitia
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Chemistry What is the Relationship Between Specific Gravity and Dilution?
  • serendipityfox
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4
Chemistry Optical isomerism in spite of plane of symmetry ....?
  • Vishesh Jain
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Chemistry Need Help with Ideal Gas Problem?
  • mimimycin
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Chemistry Compare the Bond lengths of IO2F2 and IOF3
  • Navin
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Chemistry Which Group Exhibits a Stronger Inductive Effect, Sec-Butyl or Propyl?
  • Physics lover
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Biology How does the Y chromosome crossover during meiosis?
  • musicgold
  • · Replies 5 ·
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5
Biology What are the vascular structures of this cucumber cross section?
  • Mik_lee
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Absorption Spectrum Practice problem
  • Sulfone
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Chemistry How Many Molecules Are Needed for the Grignard Reaction with a Carbonate?
  • Physics lover
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9
Chemistry Can Jones Reagent Oxidize Benzyl Alcohol?
  • Physics lover
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3
Chemistry Quantum Chemistry - Particle in a box
  • Amblambert
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Chemistry Need help with this threshold limit value (TLV) chemistry problem
  • steelermania
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A gas stream (1) contains 18 mol% hexane and remainder nitrogen flows
  • TonkaTon
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Chemistry Calculation of average molecular speed
  • subhradeep mahata
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Chemistry What Is the Meaning of pH = pKa - 1?
  • mimi88
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Chemistry The Importance of pKa in Determining Activity: A Brief Overview
  • mimi88
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How to Calculate Standard State Gibbs Energy of Bromine Vapor at 298K?
  • Est120
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Chemistry Create a Gibbs Free Energy challenge question
  • jaumzaum
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1