CHEMISTRY HIGH SCHOOL

The tendency of molecules to move toward areas of lower concentration is called _____.a. suffusion
b. diffusion
c. suspension
d. effusion

Answers

Answer 1
Answer: The correct answer is B. The tendency of molecules to move toward areas of lower concentration is called diffusion. This happens when there is a concentration gradient. This is described by the Fick's laws of diffusion. Diffusion is the net movement of molecules from a higher concentration to lower concentration to achieve equilibrium.
Answer 2
Answer:

Answer:

B: diffusion

Explanation:

Related Questions

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Which balanced equation represents an endothermic reaction?1.)C+O2-> CO22.)CH4+2O2-> CO2+2H2O3.)N2+3H2-> 2NH34.)N2+O2-> 2NO
How many neutrons does an atom ofCopper have in its nucleus?
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Given chemical equations for these reactions s(s) + o2(g)  so2(g) ∆h˚ –296.8 kj•mol–1 h2(g) + ½ o2(g)  h2o(l) ∆h˚ –285.8 kj•mol–1 h2(g) + s(s)  h2s(g) ∆h˚ –20.6 kj•mol–1 what is the value of ∆h for the reaction below? 2 h2s(g) + 3 o2(g)  2 h2o(l) + 2 so2(g) (a) –603.2 kj•mol–1 (b) –562.0 kj•mol–1

Answers

Answer is: enthalpy is -1124 kJ/mol, if we divide reaction with two enthalpy is -562.0 kJ/mol.

Reaction 1: S(s) + O₂(g) → SO₂(g) ΔrH₁ = -296.8 kJ/mol.
Reaction 2: H₂(g) + ½ O₂(g) → H₂O(l) ΔrH₂ = -285.8 kJ/mol.
Reaction 3: H₂(g) + S(s) → H₂S(g) ∆rH₃ = -20.6 kJ/mol.
Reaction 4: 2H₂S(g) + 3O₂(g) → 2H₂O(l) + 2SO₂(g) ΔrH₄ = ?
Using Hess's law reaction number 4 is sum of reaction number 1 multiply with two, reaction number 2 multiply with two and reaction 3 reversed and multiply with two:
ΔrH₄ = 2 · (-296.8 kJ/mol) + 2 · (-285.8 kJ/mol) + 2 · 20.6 kJ/mol.
ΔrH₄ = -1124 kJ/mol.

THe following elements are found in what part of the periodic table Germanium, astatine, tellurium, and arsenic?

Answers

They are elements of group IV

Name the compound of AuO

Answers

If it existed it would be gold(II) oxide. The stable gold oxide is gold(III) oxide Au2O3

Rutherford’s gold foil experiment provided evidence for which of the following statements?a. Negative and positive charges are spread evenly throughout an atom.
b. Alpha particles have a positive charge.
c. Gold is not as dense as previously thought.
d. There is a dense, positively charged mass in the center of an atom. Reset Selection

Answers

The answer is (c.) There is a dense, positively charged mass in the center of an atom
In 1899, Ernest Rutherford, a British physicist conducted a study of the absorption of radioactivity by thin sheets of metal foil. On this experiment, he concluded that all the positive charge and the mass of the atom is concentrated in a small fraction of the total volume of the atom which is called the Nucleus.  

A weather balloon of known initial volume is released. The air pressures ar its initial and final altitudes are known. Why can't you find its new volume by using these known values and Boyle's law?

Answers

Answer: you cannot find its new volume by using these known values and Boyle's law because the temperature does not remain constant.


Explanation:


Boyle's law states that the volume of a fixed amount of gas, at a constant temperature, varies inversely with the pressure.


So, it is a condition that the temperature does not change.


For the wheater ballon case, as it travels through the atmosphere, the temperature at different altitudes will be different.


So, you might use other equation of states, such as the combined law, which does deal with changes in the three variables: volume, pressure, and temperature.


The mathematical formulation of Boyle's law is:


pV = constanjt ⇒ p₁ V₁ = p₂ V₂, at constant T.


The mathematical formulation of the combined law of gases is:


pV/T = constant ⇒ p₁ V₁ / T₁ = p₂ V₂ / T₂, for a fixed amount of gas, then it might work for the weather ballon (if you know the initial and end temperatures).

You cannot find the new volume by using initial volume of the weather balloon and air pressure ai its initial and final altitudes and Boyle’s law because the given values are not the same. Boyle’s law holds for the pressure and volume of the GAS at constant temperature. Here you are given the air pressure outside the weather balloon not the inside of the balloon. They have different gases and so it would not apply.

The cell theory teaches that _____.the basic unit of life is the organism
the basic unit of life is the cell
all cells have the same basic structure
cells are miniature reflections of the organisms from which they are taken

Answers

The cell theory teaches that :

the basic unit of life is the cell
Explanation:

In biology, a scientific theory is that the historical theory, currently universally accepted, that living organisms square measure created from cells, that they're the fundamental structural/organizational unit of all organisms, which all cells come back from pre-existing cells. Cells square measure the fundamental unit of structure all told organisms and conjointly the fundamental unit of the replica.

Answer:

the basic unit of life is the cell
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