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

Author Question: A 0.465 g sample of an unknown compound occupies 245 mL at 298 K and 1.22 atm. What is the molar ... (Read 99 times)

MirandaLo

  • Hero Member
  • *****
  • Posts: 538
on: Aug 27, 2018
A 0.465 g sample of an unknown compound occupies 245 mL at 298 K and 1.22 atm. What is the molar mass of the unknown compound?
 
  A) 26.3 g/mol
  B) 33.9 g/mol
  C) 12.2 g/mol
  D) 38.0 g/mol
  E) 81.8 g/mol

Question 2

What happens to the density of a sample of iron metal as it is heated from room temperature to 100C? (This is below the melting point of iron.)
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ambernicolefink

  • Sr. Member
  • ****
  • Posts: 359
Reply #1 on: Aug 27, 2018
Answer to Question 1

D

Answer to Question 2

Since the mass of the iron stays constant, but the volume increases as the temperature is raised, the density of the iron decreases upon heating.


MirandaLo

  • Member
  • Posts: 538
Reply 2 on: Aug 27, 2018
Excellent

scottmt

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The FDA recognizes 118 routes of administration.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Sandia ear-plug-sized samplers hang poised to sample gases relevant to climate and weather. Sandia ear-plug-sized samplers hang poised to sample gases relevant to climate and weather.
compound eye of a noctuid moth compound eye of a noctuid moth
Sample Teaching Plan for Hypertension Cont. Sample Teaching Plan for Hypertension Cont.
Sample of Enzymes Sample of Enzymes
If the density of an unknown gas is 2.59 g/L at STP, what is its molar mass? If the density of an unknown gas is 2.59 g/L at STP, what is its molar mass?
Sample hypnograms of an infant at ages 3, 12, and 24 months Sample hypnograms of an infant at ages 3, 12, and 24 months
Video: Autonomic Nervous System Animation

For a complete list of videos, visit our video library