Biology and Chemistry Homework Help Forum

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Glass electrode voltage calibration and pH analysis.

  • lam58
  • · Replies 11 ·
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11

Why is sodium carbonate more thermally stable than aluminium carbonate

  • Betadine
  • · Replies 8 ·
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8
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4

Calculating entropy change associated with change in temperature

  • Ryaners
  • · Replies 6 ·
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6

Eurosciences junior chemical element question

  • Creaver
  • · Replies 7 ·
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7

VSEPR t-shaped geometry vs trig. planar

  • Puchinita5
  • · Replies 5 ·
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5

Why the experimental error for CaOH is larger than MgO?

  • Alpha123
  • · Replies 3 ·
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3
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3

Find the amount of O2 the blood absorbs in the lung in a minute

  • prishila
  • · Replies 1 ·
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1

Why iron nail doesn't corrode in NaOH solution

  • Logan Johnston
  • · Replies 7 ·
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7

Finding composition of mixture of Fe3O4 and Fe2O3

  • Titan97
  • · Replies 5 ·
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5

Balancing disproportionation redox reaction

  • erisedk
  • · Replies 3 ·
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3

Calculating moles of NaOH reacting with H3PO4 from OH⁻ concentration

  • wei1006
  • · Replies 1 ·
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1

Heat of Why Does Reaction Proceed Anyway?

  • brake4country
  • · Replies 2 ·
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2

What Are the Standard Enthalpy and Entropy Changes for the Graphed Reaction?

  • brake4country
  • · Replies 6 ·
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6

What Is the Approximate Heat of Reaction for 2H2 + O2→2H2O?

  • brake4country
  • · Replies 4 ·
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4

Why is the active mass of solids taken as unity?

  • Dr.azwar
  • · Replies 1 ·
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1

How Do You Calculate Enthalpy Change Using Bond Energies?

  • Priyadarshini
  • · Replies 8 ·
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8

Reaction between ilmenite and H2SO4?

  • goggles31
  • · Replies 1 ·
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1

Standard entropy of liquid lead at 500C?

  • magnesium12
  • · Replies 1 ·
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1

PH of Mixed Solution with 0.1M KOH and 0.1M HNO2

  • terryds
  • · Replies 15 ·
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15

C3 and C4 Plant Facts: What's Incorrect?

  • ILoveLimits
  • · Replies 2 ·
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2

Finding rotational constant B for CO from microwave spectrum

  • allure123
  • · Replies 4 ·
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4

Planting Tulip Bulbs Upside Down: What Happens?

  • Sace Ver
  • · Replies 2 ·
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2

Balancing barium chloride and silver phosphate equation

  • cgs
  • · Replies 1 ·
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1

Why is delta-H equal to q at constant pressure?

  • DiamondV
  • · Replies 11 ·
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11

Is the Combined Solution Acidic or Basic?

  • Zoey Brown
  • · Replies 3 ·
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3

Determinantal wave function of Li using LCAO?

  • magnesium12
  • · Replies 1 ·
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1

Mass of F2 needed to produce 204 kg of NF3 from N2

  • science_rules
  • · Replies 25 ·
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25

Finding the formula of a sodium carbonate hydrate by titration with HCl

  • Zoey Brown
  • · Replies 8 ·
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8

How Do Isotope Tracers Determine Mixing Ratios in Water Samples?

  • geojon
  • · Replies 1 ·
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1

How Much Precipitate Forms in a Copper Sulfate and Sodium Hydroxide Reaction?

  • Zoey Brown
  • · Replies 1 ·
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1

What mass of P4 is required to combine with 0.398 g of Cl2?

  • science_rules
  • · Replies 28 ·
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28

Chemistry What exactly happens when a molecule breaks down due to heat

  • Tiiba
  • · Replies 5 ·
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5

Determining pH using Henderson-Hasselbach equation?

  • Vicinity24
  • · Replies 12 ·
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12

Why should resonance occur in benzene?

  • ajaysabarish
  • · Replies 2 ·
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2

White Phosphorus Safety: Storing in Paraffin vs Water

  • VISHALLENI
  • · Replies 6 ·
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6

Solubility in water -- High school chemistry

  • Barclay
  • · Replies 5 ·
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5

Electron and wavelength problem

  • David112234
  • · Replies 7 ·
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7

Chemistry Understanding Simple Molecular Structures in Chemistry

  • Barclay
  • · Replies 3 ·
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3

Chemistry "Simple molecular structure do not conduct electricity" H2O?

  • Barclay
  • · Replies 2 ·
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2

What Mass of Oxygen Gas Is Liberated from Heating Sodium Nitrate?

  • science_rules
  • · Replies 2 ·
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2

Biology How to Calculate Heritability in Fruit Fly Bristle Number Genetics

  • CMATT
  • · Replies 4 ·
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4

Do you see a problem with the wording of this chemistry question?

  • smulc
  • · Replies 2 ·
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2

Calculate the concentration (in M) of Cl- ions in solution C

  • AMan24
  • · Replies 2 ·
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2

Balance Redox Reaction: 2PbO2 + 4H+ = 2Pb 2+ + O2 + 2H2O

  • Renaldo
  • · Replies 1 ·
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1

Pressure equilibrium -- I am getting my math wrong somewhere

  • maylandchastity
  • · Replies 1 ·
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1

Change in enthalpy for barium reacting with water

  • JoeyCentral
  • · Replies 16 ·
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16

What Are Common Sources of Error in Flame Test Labs?

  • GiantSheeps
  • · Replies 3 ·
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3

Ordering Rf of Aspirin with Polar Eluents

  • cloveryeah
  • · Replies 1 ·
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1

Finding empirical formula of sulfur and oxygen compound

  • asadpasat
  • · Replies 3 ·
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3

Difference between work and heat in thermodynamics

  • DiamondV
  • · Replies 9 ·
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9

Change in internal energy during vapourization of water

  • shivambehl
  • · Replies 1 ·
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1

Understanding Work and Heat Transfer in Thermodynamics

  • DiamondV
  • · Replies 2 ·
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2

What is the Major Product When Furan Reacts with Chloroform?

  • Titan97
  • · Replies 6 ·
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6

Figuring Subscripts in Single Replacement Equations

  • ptownbro
  • · Replies 4 ·
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4

Flat Rotation Curve Astronomy Question

  • ktramsay
  • · Replies 1 ·
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1

What is the pH of a 6.0×10^-4 M NaNO2 Solution?

  • TheSodesa
  • · Replies 5 ·
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5

Number of electrons to balance redox reaction

  • terryds
  • · Replies 5 ·
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5

Does silica gel and sodium polyacrylate adsorb alcohols besides water?

  • megawatt
  • · Replies 1 ·
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1

Endergonic reaction vs endothermic reaction.

  • MBBphys
  • · Replies 3 ·
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3

What Side of the Bromothymol Blue Equilibrium is Favored?

  • Badgeray
  • · Replies 4 ·
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4

Can I Create a Calibration Curve Using Only Peak Area Data?

  • CannonSLX
  • · Replies 8 ·
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8

How Do You Calculate the Equilibrium Constant for a Weak Acid in Water?

  • yango_17
  • · Replies 2 ·
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2

Coal Gasifier - Thermodynamics Question

  • Rett
  • · Replies 4 ·
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4

What are the esters formed from fumaric acid and propanol ?

  • Alpha123
  • · Replies 4 ·
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4

How did natural selection impact the size and foot structure of horses?

  • Sace Ver
  • · Replies 2 ·
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2

Do single-celled organisms obtain oxygen by diffusion or osmosis?

  • Barclay
  • · Replies 4 ·
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4

How many atoms in 2.5 mol of ethyl acetate?

  • Sace Ver
  • · Replies 10 ·
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10

Chemistry Calculating Moles of Chlorine Atoms in 71g of MCl2

  • Sace Ver
  • · Replies 1 ·
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1

Finding the mass of oxygen in 250g of calcium carbonate

  • Sace Ver
  • · Replies 8 ·
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8

How to Calculate Moles and Mass in a Copper Sulphate Pentahydrate Sample?

  • Sace Ver
  • · Replies 3 ·
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3

Chemistry How many hydrogen atoms in one mole of H₂?

  • Sace Ver
  • · Replies 7 ·
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7

What is the Mass of Sulphur in 71g of Na2SO4?

  • Sace Ver
  • · Replies 5 ·
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5

Chemistry Finding formula of compound with 3 O, 1 Al, and 3 H atoms

  • Sace Ver
  • · Replies 3 ·
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3

Chemistry How to Calculate Moles of Carbon and Oxygen in a Given Amount of CaCO3?

  • Sace Ver
  • · Replies 10 ·
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10

How Many Oxygen Atoms Are in Oxygen Gas?

  • Sace Ver
  • · Replies 1 ·
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1

Causes of Global Sea Level Rise: Thermal Expansion, Glacial Melting, and More

  • TheMathNoob
  • · Replies 1 ·
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1

Chemistry How Many Moles of Polymer Are Formed?

  • Janiceleong26
  • · Replies 25 ·
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25

How Do You Calculate pH and [OH-] for a Mixed NH3 and NH4Cl Solution?

  • Alex Santos
  • · Replies 1 ·
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1

How do I find the ph without using Hasselbach's equation?

  • kinderman
  • · Replies 1 ·
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1

Does a seismic reflection from layer 3 reveal its velocity?

  • RJLiberator
  • · Replies 4 ·
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4

Which seismogram component shows P and SH waves best?

  • RJLiberator
  • · Replies 3 ·
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3

Electrolysis of copper(II) nitrate with silver and gold impurities at anode

  • AryaUnderfoot
  • · Replies 2 ·
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2

Determining the reaction intermediates

  • rwooduk
  • · Replies 4 ·
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4

Moles of hydrogen gas collected over water at known vapor pressure

  • AMan24
  • · Replies 4 ·
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4

Reaction rates, temperature, and thermal energy

  • brake4country
  • · Replies 5 ·
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5

Checking Diagram for H2, CO, CH4 Reactor Flow Ratios

  • CannonSLX
  • · Replies 8 ·
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8

Electron Energy Level Fall at a Given Wave Length

  • ptownbro
  • · Replies 15 ·
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15

Energy release and levels during electron transition

  • ptownbro
  • · Replies 12 ·
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12

Why does isobutane give an extremely large Kb value from its pKa?

  • sciencegem
  • · Replies 2 ·
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2

Finding reaction time with a rate law depending on two concentrations

  • sciencegem
  • · Replies 17 ·
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17

How Do You Calculate Seismic Moment for Major Earthquakes?

  • RJLiberator
  • · Replies 2 ·
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2

Solvent effect in ambident nucleophiles

  • Titan97
  • · Replies 3 ·
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3

Finding coefficients y and z in the iodate-peroxide redox reaction

  • ChloeYip
  • · Replies 17 ·
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17

Why Is There No Immunity After Parasitic Infection?

  • Raghav Gupta
  • · Replies 1 ·
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1

Understanding Ligand Strength: [Cu(H2O)6]2+ to [CuCl4]2-

  • AryaUnderfoot
  • · Replies 3 ·
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3

How do you calculate the pH of 35.0-mL of 0.15M acetic acid?

  • Eclair_de_XII
  • · Replies 6 ·
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6

ECG changes after exercise compared to resting

  • shadows122
  • · Replies 6 ·
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6

Work out cardiac cycle and heart rate

  • shadows122
  • · Replies 5 ·
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5