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

Author Question: Which contains more moles of material: 80 grams of helium gas (He, having atomic weight 4.0 g/mol) ... (Read 102 times)

c0205847

  • Hero Member
  • *****
  • Posts: 531
on: Jul 29, 2018
Which contains more moles of material: 80 grams of helium gas (He, having atomic weight 4.0 g/mol) or 400 grams of argon gas (Ar, having atomic weight 40 g/mol)?
 
  A) helium
  B) argon
  C) Both contain the same number of moles.

Question 2

When a vapor condenses,
 
  A) the temperature of the substance increases.
  B) the temperature of the substance decreases.
  C) heat energy leaves the substance.
  D) heat energy enters the substance.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Sweetkitty24130

  • Sr. Member
  • ****
  • Posts: 291
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: A

Answer to Question 2

Answer: C


c0205847

  • Member
  • Posts: 531
Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

debra928

  • Member
  • Posts: 342
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

Medication errors are more common among seriously ill patients than with those with minor conditions.

Did you know?

Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.

The birth weight of human infants is tightly constrained by natural selection. The birth weight of human infants is tightly constrained by natural selection.
Atomic Radius Atomic Radius
Charting Progress: Weekly Weight Loss Log Charting Progress: Weekly Weight Loss Log
A wrench after it has been forged but before the flashing (extra material around the wrench) has ... A wrench after it has been forged but before the flashing (extra material around the wrench) has ...
Metric System: Measure of Weight and Volume Metric System: Measure of Weight and Volume
Overhead stretch for the shoulder muscles. Lean back to create the stretch using your body weight. Overhead stretch for the shoulder muscles. Lean back to create the stretch using your body weight.
Video: Sister chromatids of a metaphase chromosome animation

For a complete list of videos, visit our video library