25,963 Answered Questions for the topic chemistry

Chemistry

03/18/25

pH and pKa Henderson-Hasselbalch Approach
Calculate the pH of a buffer solution that is 0.050 M in benzoic acid (HC7H5O2) and0.150 M in sodium benzoate (NaC7H5O2). For benzoic acid, Ka = 6.5 × 10–5.Please show with ICE table too.
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Chemistry Science Biology Reading

03/17/25

Are you looking for a MCAT tutor?
Hi, I'm Hong! I graduated from Stanford with Bachelor and Masters in Biology, and I'm currently pursuing an MD/MBA from Virginia Tech Carilion SOM.One of my greatest strengths is tutoring and... more
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Chemistry

03/17/25

A 0.5224-g sample of an unknown monoprotic acid was titrated with 0.0998 M NaOH.

A 0.5224-g sample of an unknown monoprotic acid was titrated with 0.0998 M NaOH. The equivalence point of the titration occurred at 23.82 mL. Determine the molar mass of the unknown acid.Please... more
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Chemistry

03/17/25

Calculate the solubility of silver chloride in a solution that is 0.100 M in NH3. Using Ksp
Calculate the solubility of silver chloride in a solution that is 0.100 M in NH3. (Use standard Ksp AgCl(s) = 1.77 x 10-10 andKf Ag(NH3)2+ = 1.7 x 107 )
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Chemistry

03/17/25

Calculate the molar solubility of barium fluoride in each liquid or solution.

Calculate the molar solubility of barium fluoride in each liquid or solution. BaF2 Ksp = 2.45 x 10-5 Ksp(BaF2)=2.45×10−5 a) Pure water b) 0.15 M NaF
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Chemistry

03/17/25

What is the pH of 0.214 M KCN?
What is the pH of 0.214 M KCN?When search the internet, often the equation is changed to HCN, what happens to the Potassium?How to solve?Thank you!
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03/16/25

General Chemistry 2
The pH of an aqueous solution of 0.248 M sodiumcyanide, NaCN, is (answer). (Assume that Ka (HCN) = 4.00 x 10^-10).This solution is _____ (acidic, neutral, basic).
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Chemistry

03/16/25

Arrange the solutions in order of increasing acidity. Given Ka & Kb values
Arrange the solutions in order of increasing acidity. Ka (NH4+) = 5.6 x 10-10 Kb (ClO2-) = 9.1 x 10-13 NaCl, NH4Cl, NaHCO3, NH4ClO2, NaOHWhere to even begin?
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Chemistry Biology Biochemistry

03/15/25

How can a student best keep up with what is reduced and what is oxidized in a given equation?
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Chemistry

03/13/25

What is the molecular geometry for methane?
How do you know the molecular geometry of methane?
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03/13/25

Gen Chem 2: Ice Tables
5. Build an ICE table for the acid dissociation of ascorbic acid. • Suppose that the percent dissociation is small enough for [HOAsc]initial to be much larger than “x”. • Use the relationship... more
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Chemistry

03/11/25

Determine mRNA & Amino Acids in sequence

Below is a sequence of eukaryotic DNA; determine the mRNA sequence and the polypeptide chain.Underlined = intronsNot underlined =... more
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Chemistry

03/09/25

Determine the pH at the following points in the titration.
A 0.0405 L volume of 0.11 M hypochlorous acid (HClO), a weak acid with Ka = 4.0 ✕ 10−8, is titrated with 0.11 M rubidium hydroxide (RbOH), a strong base.(a) before any RbOH has been added (c)... more
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Chemistry

03/03/25

Molar mass with boiling point?
A solution of 35.7 g of a nonelectrolyte in 220.0 g of chloroform has a boiling point of 64.5 °C. Assuming ideal solution behavior, what is the molar mass of this compound?
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Chemistry

03/03/25

Density to find Molality
Nitric acid, HNO3(aq), is commercially available as a 33.7 m aqueous solution (density = 1.35 g/mL). What is the molarity of this solution?Every time I see a problem where it gives the density to... more
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Chemistry

03/01/25

My Business Tab
The my business tab isn't not showing in order for me to add the session to my calendar
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Chemistry Biology Writing Anatomy

02/28/25

How do I get into medical school?
I am a 3rd-year medical student that has been helping students achieve their goals of becoming a physician. Through my experience, I can help guide students on timelines, what to have in their... more
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Chemistry

02/27/25

Given the provided reactions and ΔH values, calculate (ΔH) for the following reaction 4NH3 (g) + 5O2 (g) ==> 4NO (g) + 6H2O (g) . Also, determine the ratio of the bond enthalpy of N=O to O=O.
(ΔH N-H = 391, ΔH O=O = 495, ΔH O-H = 463 KJ. Mol-1 )1)3NO2(g) + H2O (g) ==> 2 HNO3 (aq) + NO (g) ΔH1= -71.3 KJ2)NH4NO3(s) ==> 4N2O (g) + 2 H2O (g) ΔH2 =-125.2 KJ3)3NO(g) ==> N2O (g) +... more
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Chemistry

02/17/25

Acid Base Titration lab Stoichiometry

Percent weight calculation. 0.10 mole of acetic acid (CH3COOH) is dissolved in 100 mL of water. (Assume the density of water is 1.00 g/mL.) What is the percentage (w/w) of acetic acid in this... more
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Chemistry

02/17/25

Diprotic Acid ? - Two Ionizations ?
Oxalic acid (C2H2O4) is a diprotic acid. Write the two ionization reactions for C2H2O4 to C2O42−. Can you please explain how this works and create the reactions?
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Chemistry

02/09/25

For the Reaction A(g)+B(g)+C(g)->D(g) the following data were obtained at constant temperature.
Expt:1– initial rate=6.25x10^-3 M/s, initial [A]= 0.0500 M, initial [B]= 0.0500 M, initial [C]= 0.0100 M2– initial rate=1.25x10^-2 M/s, initial [A]= 0.1000 M, initial [B]= 0.0500 M, initial [C]=... more
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Chemistry

02/09/25

Please help me understand how to use a diagram to identify which period of elements is most likely to have the strongest intermolecular forces.
Please help me understand why period 5 is the right answer to the question - use a diagram to identify which period of elements is most likely to have the strongest intermolecular forces.
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Chemistry Science

02/09/25

Double Displacement: How can Iron (III) Chloride and Sodium Hydroxide react if Fe is below Na in the Reactivity Series?
I just wanted to check if I am thinking of this the right way. My understanding of using the reactivity chart is to check if the metal in the first reactant (on the left of the + sign) is higher... more
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02/08/25

Chemistry Kinetics
A reaction is performed to study the reaction of nitrogen dioxide with carbon monoxide:NO2 + CO --> NO + CO2The following reaction rate data was obtained in four separate... more
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02/08/25

Chemistry kinetics
NO reacts with H2 in the gas phase according to the following chemical equation: 2NO(g) +2H2(g)N2(g) +2H2O(g) It is observed that, when the concentration of H2 is reduced to 1/3 of its initial... more
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