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

Author Question: 9.26 g of an unknown solid is dissolved in a coffee cup calorimeter that contains 62.0 mL of water. ... (Read 1297 times)

Redwolflake15

  • Hero Member
  • *****
  • Posts: 569
on: Nov 18, 2019

Question 1

10.618 g of an unknown salt is dissolved in a coffee cup calorimeter that contains 50.0 mL of water. The measured temperature decreased from 23.8 °C to 22.7 °C. Identify the unknown salt. The specific heat of water is 4.184 J g-1 °C-1, and assume the density of the solution is 1.00 g mL-1.
◦ NaNO3, DrH = 20.50 kJ mol-1
◦ NaBr, DrH = -0.60 kJ mol-1
◦ NaF, DrH = 0.91 kJ mol-1
◦ LiBr∙2H2O, DrH = -23.26 kJ mol-1
◦ LiNO3, DrH = -2.51 kJ mol-1

Question 2

9.26 g of an unknown solid is dissolved in a coffee cup calorimeter that contains 62.0 mL of water. The measured temperature increased from 23.4 °C to 24.7 °C. The specific heat of water is 4.184 J g-1 °C-1, and assume the density of the solution is 1.00 g mL-1. Calculate the molecular weight of the unknown solid if the DrH was determined to be -2.51 kJ mol-1 via another experiment.
◦ 48 g mol-1
◦ 69 g mol-1
◦ 93 g mol-1
◦ 184 g mol-1
◦ 76 g mol-1
Chemistry: A Molecular Approach (Canadian) ¦ Tro, Fridgen, Shaw ¦ 2nd Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by Redwolflake15 on Nov 18, 2019

tuate

  • Sr. Member
  • ****
  • Posts: 332
Reply #1 on: Nov 18, 2019
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 41% of students answer this correctly


Nia Daniels

  • Newbie
  • *
  • Posts: 1
Reply #2 on: Apr 15, 2020
Thank you!


2333 .

  • Newbie
  • *
  • Posts: 1
Reply #3 on: May 27, 2020
Thank you


Kenny Porter

  • Newbie
  • *
  • Posts: 1
Reply #4 on: May 27, 2020
thank you!


john321123

  • Newbie
  • *
  • Posts: 1
Reply #5 on: Jul 19, 2020
Thank you!


Andy Chen

  • Newbie
  • *
  • Posts: 1
Reply #6 on: Jul 19, 2020
thak you


chinaza ikeanyanwu

  • Guest
Reply #7 on: Apr 18, 2021
thank you


chloeeee22

  • Newbie
  • *
  • Posts: 1
Reply #8 on: Jun 30, 2022
Thank you!


« previous next »
 

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

If all the neurons in the human body were lined up, they would stretch more than 600 miles.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

Water and salt regulation by isosmotic, hyperosmotic, and hypoosmotic aquatic organisms. Water and salt regulation by isosmotic, hyperosmotic, and hypoosmotic aquatic organisms.
Chinese Water Deer (Hydropotes inermis inermis) at the Whipsnade Zoo. Chinese Water Deer (Hydropotes inermis inermis) at the Whipsnade Zoo.
Water Water
Water caltrop Water caltrop
Adjust the water coming from the faucet so that the temperature is comfortable. Water too hot can ... Adjust the water coming from the faucet so that the temperature is comfortable. Water too hot can ...
How much water does the amniotic sac hold? How much water does the amniotic sac hold?
Video: Net filtration pressure and lymph formation, edema & blood velocity

For a complete list of videos, visit our video library