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
timurjin [86]
3 years ago
13

Which sample is a pure substance?

Chemistry
2 answers:
Drupady [299]3 years ago
6 0

Answer:

a test tube of zinc and oxygen

Explanation:

i just did on edgen

Tema [17]3 years ago
3 0
A test tube of zinc oxide
You might be interested in
State the assumptions that the kinetic-molecular theory makes about the characteristics of gas particles
Marrrta [24]

The kinetic-molecular theory explains the properties of the gases in terms of energy, size and motion of their particles.


The assumptions that the kinetic-moletuclar theory makes about the characteristics of gas particles are:


1. Gases are constituted by a large amount of particles (atoms or molecules) symilar to solid spherical sphers, in constant and random motion.


2. Gas particles move in straight line until collide with another particle or the walls of the vessel.


3. Gas particles are so small compared to the distances that separate them, that the volume of the gas is considered empty space: the volume of the particles is neglected.


4. Beside the already mentioned collisions with the walls of the vessels or between the particles, there is no interaction (attractive or repulsive forces) acting on the gas particles.

 

5. The collisions between gas particles or with the walls of the vessel are elastic: there is not loss of energy.


6. The average kinetic energy of the particles in a gas depends only on the absolute temperature of the gas: at a given temperatue every gas have the same average kinetic energy.


That collection of assumptions are used to explain such things as: the relation  of pressure withthe  number of particles, the relation of pressure and temperature, the relation of pressure and volume, the relation of volume and temperature, Avogadro's hypothesis (relation of volume and number of particles), Dalton's Law of partial pressures, and both effusion and difusion.

5 0
3 years ago
Which statement identifies the function of a cathode in every in every electrochemical cell
torisob [31]

The answer is B because <span>It would be useful to memorize that sentence. Once you know that, you can figure out whatever else happens at the anode, the cathode, in the solution, and in the external circuit.</span>
6 0
3 years ago
What would a substance that could undergo condensation polymerization most likely have? two double bonds a triple bond two aldeh
blagie [28]
The fourth option on Edgen, "two alcohol functional groups". You're welcome :)
5 0
3 years ago
Read 2 more answers
The numerator is the blank number in a fraction, while the denominator is the blank number in a fraction
tigry1 [53]
The top number of a portion is called its numerator whereas the bottom number is its denominator. So a Fraction is the quantity of shaded parts separated by the quantity of a balance of as demonstrated as follows: number of shaded parts is the numerator over the whole part which is the denominator.
8 0
3 years ago
, Hydrocarbons are compounds that contain(1) carbon, only(2) carbon and hydrogen, only(3) carbon, hydrogen, and oxygen, only(4)
Firdavs [7]
Hydrocarbons are compounds formed by only hydrogen atoms and carbon.

Answer (2)

hope this helps!
4 0
3 years ago
Other questions:
  • What is the approximate pH of a .06 M solution of CH3COOH given that Ka= 1.78*10-5
    12·1 answer
  • A parchment fragment was discovered that had about 68% as much 14C radioactivity as does plant material on Earth today. Estimate
    6·1 answer
  • 2 radioactive isotopes of oxygen?
    5·1 answer
  • If urine has a density of 1.08 g/ml, what would be the mass of a 125 ml urine sample?
    15·2 answers
  • The rate law for a hypothetical reaction is rate = k [A]2. When the concentration is 0.10 moles/liter, the rate is 2.7 × 10-5 M*
    8·2 answers
  • HEY ITS E AGAIN HELP ITS A TEST
    8·1 answer
  • A plane flying at 250 mph for 5 hours. how far did the plane fly? <br><br> will give brainliest
    12·2 answers
  • If 150 G of wood started Burning, and 30 G of wood ash was left behind, how many grams of CO2 to gas was released
    15·1 answer
  • PLEASE HELP ME!!! i have no idea how to answer these!
    6·1 answer
  • A<br>Which property of a gas affects the rate at which it spreads throughout<br>laboratory?​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!