1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
valentinak56 [21]
4 years ago
4

A sample of helium gas occupies 12.9 L at 315 K and 1.20 atm.

Chemistry
1 answer:
julsineya [31]4 years ago
5 0

Answer:

There are 0,6 moles of helium.

Explanation:

We use the ideal gas formula, we use the gas constant R = 0.082 l atm / K mol and we solve for n (number of moles) of the formula:

PV=nRT -->  n= PV/RT

n= 1,20 atm x 12,9 L/ 0.082 l atm / K mol   x 315 K= <em>0,599303135 moles</em>

You might be interested in
What type of central-atom orbital hybridization corresponds to each electron-group arrangement:
dimaraw [331]

The type of central-atom orbital hybridization corresponds to each electron-group arrangement

Linear

What is linear arrangement?

Linear molecules are molecules that are straight and have a bond angle of 180 degrees. These molecules are made up of a central atom that is bonded to two other atoms via single or double bonds (sometimes there can be triple bonds as well).

Furthermore, the central atom usually can have either 0 or 3 lone electron pairs (AX2 or AX2E3) in the AXE notation.

The geometry described by linear molecular geometry revolves around a central atom that is bonded to two other atoms (or ligands) at a bond angle of 180°.

To learn more about linear molecular geometry

brainly.com/question/16178099

#SPJ4

3 0
2 years ago
25. In the investigation shown the changes in heat of the copper is greater than the change in the heat of the water. What error
forsale [732]

Answer:

Heat lost to the surroundings

Heat lost to the thermometer

Explanation:

All changes in heat, or energy, can be explained. Many of the reactions or changes we see in the world involve the conversion of energy. For example as we heat up a substance (eg. water), the amount of energy we put in should give us an exact temperature. However, this is a "perfect world" scenario, and does not occur in real life. Whenever heat is added to a substance like water, we always need to account for the energy that is going to be lost. For example, heat lost to evaporation or even the effect of measuring the temperature with a thermometer (the introduction of anything including a thermometer will affect the temperature).

3 0
3 years ago
What name describes the top-level aquifer?
Katyanochek1 [597]

Answer:

A

Explanation:

because the rain go down in the earth

3 0
3 years ago
Based on appearances, which group of animals likely has the greatest genetic diversity?
svp [43]
I think that the answer would be birds because they are very different depending on species
5 0
3 years ago
Read 2 more answers
How to tell if an element is more metallic
Rina8888 [55]
Check its reactivity the most reactive is the most metallic. And remember in  third group of the periodic table contains all metals  
5 0
3 years ago
Read 2 more answers
Other questions:
  • The process by which water vapor changes to liquid water is called
    7·1 answer
  • The Resource Conservation and Recovery Act controls hazardous waste from its creation to its disposal. Please select the best an
    13·2 answers
  • How many joules of energy are required to vaporize 423 grams of water at 100 degrees Celsius and 1 atm?
    10·1 answer
  • Which type of substance is soft has a low melting point is a poor conductor of heat and electricity
    8·1 answer
  • Jan was told by her mother to clean a kettle which had a heavy deposit of limescale. Her friends suggested the following product
    11·1 answer
  • What type of potential energy do fuels contain
    5·2 answers
  • Helllppp pls<br><br> Explain how human body maintains normal body temperatur
    11·1 answer
  • Questions 4-6 Identify these three equations If they are alpha, beta, or gamma decay.
    5·1 answer
  • I am so confused that i don't even understand how to answer it
    12·1 answer
  • I NEED HELP ASAP!!!!!!!!!!!! <br> WITHIN THE HOUR <br> Thanks
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!