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
olga2289 [7]
2 years ago
10

Which of the following apply to gases. Select all that apply.

Chemistry
1 answer:
alexira [117]2 years ago
8 0
The answer is C , hope I helped
You might be interested in
Why can scientist assume elastic collisions as long as the temperature remains constant?
Tema [17]

Answer:

Because in elastic collisions there is no heat emission or absorption.

Explanation:

A collision is considered elastic when the total kinetic energy of the study system is conserved during the collision. Since the total kinetic energy is conserved, heat is not emitted or absorbed during the collision. Since the emission or absorption of heat is what produces changes in temperature, If the system remains at a constant temperature, there were only elastic collisions.

8 0
3 years ago
You are asked to prepare 500. mL of a 0.200 M acetate buffer at pH 5.10 using only pure acetic acid (MW=60.05 g/mol, pKa=4.76),
Alenkasestr [34]

Answer:

1. 6.005 g

2. 22.9 mL

3. Until the mixtures becomes homogeneous.

Explanation:

A buffer is a solution where a weak acid is in equilibrium with its conjugate base (its anion) or a weak base is in equilibrium with its conjugate base (its cation). The buffer remains the pH almost unaltered because it shifts the equilibrium if an acid or base is added.

1. The pH of a buffer can be calculated by the Henderson-Hasselbalch equation:

pH = pKa + log[A⁻]/[HA]

Where [A⁻] is the concentration of the conjugate base (the anion) of the acid, and HA is the acid concentration.

5.10 = 4.76 + log[A⁻]/[HA]

log[A⁻]/[HA] = 5.10 - 4.76

log[A⁻]/[HA] = 0.34

[A⁻]/[HA] = 10^{0.34}

[A⁻]/[HA] = 2.1878

Because the volume is the same, we can replace the concentration by the number of moles (n):

nA⁻/nHA = 2.1878

nA⁻ = 2.1878*nHA

The total number of moles of the substances in the buffer is: 0.200 mol/L * 0.5 L = 0.1 mol

nA⁻ + nHA = 0.1

2.1878*nHA + n HA = 0.1

3.1878nHA = 0.1

nHA = 0.0314 mol

nA⁻ = 0.0686 mol

The total number of moles of acetic acid needed is 0.1 mol (both substances may be from it):

m = MW*mol

m = 60.05*0.1 = 6.005 g

2. NaOH must react with acetic acid to form the anion, so for a 1:1 reaction, it will be needed 0.0686 mol of NaOH:

V = mol/concentration

V = 0.0686/3

V = 0.0229 L = 22.9 mL

3. The buffer must be a homogeneous solution, it means that it can't be noticed phases in the buffer, so the flask must be inverted until all the buffer is diluted in water, and it will be noticed when the solution becomes homogenous.

6 0
3 years ago
PLEASE HELP ME ON THIS ​
lisabon 2012 [21]

Answer:

The conductance will increase as the concentration of the electrolyte is increased.  

Explanation:

The ions are what carry the charges from one electrode to another.  The more there are, the easier it is for electrons to get across the solution of electrolyte,

3 0
2 years ago
Dermal tissue in plants, is most like what tissue in humans?
Arte-miy333 [17]
The dermal tissue is basically the outer part of the cell that protects the plant cell so in that case it would be the carbohydrate or cell wall. If you would put the choices it could have been a bit better :)
7 0
3 years ago
Kinetic energy differs from chemical energy in that
Sliva [168]
Chemical energy is the answer to your question
6 0
3 years ago
Other questions:
  • A sheet of aluminum foil has a total area of 1.000 m2 and a mass of 3.636 g. What is the thickness of the sheet in millimeters?
    10·1 answer
  • Why have very few planets with low mass (comparable to mars or mercury) been found?
    10·2 answers
  • How many grams of CO2 will be produced from 12.0 g of CH4 and 133 g of O2 ?
    7·1 answer
  • How many molecules of oxygen gas are in 3.00 moles
    13·1 answer
  • Calcium and sulfur Enter the ions formed by these elements and separate your answers with a comma (e.G., Sr2+,As3−).
    6·1 answer
  • Explain why the metals conduct electricity
    13·1 answer
  • I have a homework and I need help please.​
    15·1 answer
  • Will has been told to check the oxygen level in a confined space, before workers are allowed to enter. Will should verify that t
    10·1 answer
  • The name for a wavelength that is formed<br> from combined waves??
    11·1 answer
  • Can someone please help me identify these functional groups? Please it’s extremely urgent
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!