This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A chemist is given a white solid that is suspected of being pure cocaine (molar mass = 303.35 ... (Read 60 times)

KWilfred

  • Hero Member
  • *****
  • Posts: 570
on: Mar 21, 2021
A chemist is given a white solid that is suspected of being pure cocaine (molar mass = 303.35 g/mol). When 1.22 g of the solid is dissolved in 15.60 g of benzene, the freezing point is lowered by 1.32°C. The molar mass is calculated from these data to be 303 g. Assuming the following uncertainties, can the chemist be sure the substance is not codeine (molar mass 299.36)? Kf for benzene is 5.12°C/m.

              Uncertainties

              Mass of solid = ±0.01 g

              Mass of benzene = ±0.01 g

              ΔT (freezing point lowering) = ±0.04°C

              Kf = ±0.01

              Support your answer with calculations.

Chemistry: An Atoms First Approach ¦ Zumdahl, DeCoste ¦ 3rd Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by KWilfred on Mar 21, 2021

Mollythedog

  • Sr. Member
  • ****
  • Posts: 340
Reply #1 on: Mar 21, 2021
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 25% of students answer this correctly


KWilfred

  • Member
  • Posts: 570
Reply 2 on: Mar 21, 2021
Thanks for the timely response, appreciate it

vickybb89

  • Member
  • Posts: 347
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

Did you know?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Did you know?

Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

White lion White lion
Two devils, one without any white markings. Around 16% of wild devils have no markings. Two devils, one without any white markings. Around 16% of wild devils have no markings.
Solid Foods Should Be Introduced Gradually after Certain Milestones Are Reached Solid Foods Should Be Introduced Gradually after Certain Milestones Are Reached
White, Blond and Brown Roux White, Blond and Brown Roux
Solid Drug Forms Solid Drug Forms
Video: The Nerve Impulse

For a complete list of videos, visit our video library