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Chemistry

04/17/25

A sample of Argon has a volume of 4.3 mL at 24°C. At what temperature in degrees Celsius is will it have a volume of 19.3 mL?

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Chemistry

04/13/25

Find The Empirical Formula

Tetrahydrocannabinol (THC), the active agent in marijuana, contains 80.16% carbon, 9.63% hydrogen, and 10.17% oxygen by mass. What is the empirical formula of THC?

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Chemistry Organic Chemistry

04/13/25

Benzocaine synthesis: Why are we using both water and methanol?

To purify the product, it will be boiled in water, then hot methanol will be added until the solid just dissolves. The mixture will be allowed to cool, and the product that recrystallizes will be... more

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Answers •1

Chemistry

04/11/25

Add student to parent account

I set up the account looking for a tutor for my child. She now has a tutor and meeting scheduled. How do I add her to my account?

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Answers •1

Chemistry

04/09/25

What would the pH of the solution be if 25.0 mL of 0.250 M NaOH were added?

A solution is prepared by dissolving 15.0 g of pure HC2H3O2 and 25.0 g of NaC2H3O2 in 775 mL of solution (the final volume). The pH of the solution was found to be 4.83. What would the pH of the... more

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Chemistry Organic Chemistry

04/07/25

Assign the aromatic signals to the product

I have an HNMR of 4-hydroxy-3-iodoacetophenone with a close up of the aromatic region. I want them assigned. I have a doubled at around 745Hz. a doublet of doublets at 690-710Hz a singlet at around... more

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Chemistry

04/03/25

Buffers and how they affect pH

What is a buffer?

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Answers •2

Chemistry

04/02/25

Chemistry is not difficult

Help me with this exercise!!!Mix 50 ml of 0.1M HCl solution with 100 ml of 0.2M NaOH solution. Calculate the molar concentration of the ions in the solution after the reaction. Drift... more

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Chemistry Esl/esol

04/01/25

"What are more formal ways to say 'Thanks a lot' in professional emails?"

I often use "Thanks a lot" in emails to coworkers or clients. Are there any better or more professional alternatives I could use?

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Answers •2

Chemistry

03/25/25

Find pH from given concentration and Kb

What is the pH of a 0.050 M triethylamine, (C2H5)3N, solution?Kb for triethylamine is 5.3 × 10–4.Please anything to help, these are starting to get more confusing instead of easy.

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Chemistry

03/25/25

Find pOH with Concentration and Kb

Determine the pOH of a 0.227 M C5H5N solution at 25°C. The Kb of C5H5N is 1.7 × 10-9If you have hints how to remember these more easily, that would be appreciated. Using pH to find the... more

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Answers •1

Chemistry

03/25/25

Using concentration and Kb to find pH

What is the pH of a 0.050 M triethylamine, (C2H5)3N, solution?Kb for triethylamine is 5.3 × 10–4

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Chemistry

03/25/25

Determine the ammonia concentration of an aqueous solution that has a pH of 11.00.

Determine the ammonia concentration of an aqueous solution that has a pH of 11.00. The equation for the dissociation of NH3 (Kb = 1.8 × 10-5) is NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH-(aq)

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Chemistry

03/25/25

How many grams are in 5.58 x 10^24 formula units of tin (IV) nitrate?

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Chemistry

03/25/25

How many molecules are in 10.8 grams of C12H22O11?

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Chemistry

03/25/25

how many molecules are in 25.5g of iron (iii) hydroxide?

How many molecules are in 25.5g of iron (iii) hydroxide?

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Answers •2

Chemistry

03/23/25

Concentration of all solute species

Calculate the concentration of all solute species in each of the following solutions of saltsin contact with a solution containing a common ion. Show that changes in the initial concentrations of... more

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Chemistry

03/23/25

Finding Ksp Solubility Product

The molar solubility of Ag2SO4 in pure water is 1.4 × 10–2 M. Calculate Ksp.

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Chemistry Pharmacology

03/23/25

pH of Aspirin given pKa

Aspirin pKa of 3.5 Molar Mass = 180.15 g 32oz = 1.0567LCalculate the pH of a solution in which one normal adult dose of aspirin 6.50X 102 mg is dissolved in 8.0 oz of water. I have attempted this... more

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Chemistry

03/23/25

A 100.0 mL sample of 0.10 M NH3 is titrated with 0.10 M HNO3. Find PH!!!

A 100.0 mL sample of 0.10 M NH3 is titrated with 0.10 M HNO3Kb NH3 = 1.8 x 10-5a) pH of the solution before addition of any HNO-b) pH of solution after addition of the 50.0 mL of HNO3

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Chemistry

03/23/25

Titration of HNO2 with NaOH...need pH

Consider a titration of 10.0 mL of 0.30 M HNO2 with 0.10 M NaOH.Ka HNO2 = 7.1 x 10-4a. pH of solution before titration begins?b. pH when 12.00 mL NaOH has been added?c. pH when 15.00 mL NaOH is added

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Answers •1

Chemistry

03/21/25

CHEM 2 Solubility

Calculate the Qsp or Ksp, as indicated, and determine whether a precipitate will form when each of the following mixtures is prepared. (You may assume temperature is held constant, volumes are... more

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Chemistry

03/18/25

Rewards program

Hello,Do you all still have the referral program where the referee gets 40$ for referring someone

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Answers •1

Chemistry

03/18/25

Use Ksp & Kf to find equilibrium constant for the reaction

Use the values of Ksp FeS(s) = 3.72 x 10-19 and Kf Fe(CN)64−(aq) = 1.5 x 1035 andto find the equilibrium constant for the reaction.FeS(s) + 6 CN− (aq) ⇌ Fe(CN)6 4− (aq) + S2−Please solve using... more

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Chemistry

03/18/25

A 50.0-mL sample of 0.200 M sodium hydroxide is titrated with 0.200 M nitric acid.

A 50.0-mL sample of 0.200 M sodium hydroxide is titrated with 0.200 M nitric acid.Calculate pH:after adding 30.00 mL of HNO3at the equivalence point

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Answers •1

A sample of Argon has a volume of 4.3 mL at 24°C. At what temperature in degrees Celsius is will it have a volume of 19.3 mL?

Find The Empirical Formula

Benzocaine synthesis: Why are we using both water and methanol?

Add student to parent account

What would the pH of the solution be if 25.0 mL of 0.250 M NaOH were added?

Assign the aromatic signals to the product

Buffers and how they affect pH

Chemistry is not difficult

"What are more formal ways to say 'Thanks a lot' in professional emails?"

Find pH from given concentration and Kb

Find pOH with Concentration and Kb

Using concentration and Kb to find pH

Determine the ammonia concentration of an aqueous solution that has a pH of 11.00.

How many grams are in 5.58 x 10^24 formula units of tin (IV) nitrate?

How many molecules are in 10.8 grams of C12H22O11?

how many molecules are in 25.5g of iron (iii) hydroxide?

Concentration of all solute species

Finding Ksp Solubility Product

pH of Aspirin given pKa

A 100.0 mL sample of 0.10 M NH3 is titrated with 0.10 M HNO3. Find PH!!!

Titration of HNO2 with NaOH...need pH

CHEM 2 Solubility

Rewards program

Use Ksp & Kf to find equilibrium constant for the reaction

A 50.0-mL sample of 0.200 M sodium hydroxide is titrated with 0.200 M nitric acid.

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