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3 years ago

What does it mean to discuss the concentration of a solution

Chemistry

1 answer:

nevsk [136]3 years ago

7 0

When you are discussing the concentration of solution, you are discussing how many particles there are in a given amount of solvent. You are comparing. If there is more solute in a beaker of solvent, then it is highly concentrated. If there is less solute in a beaker of the same amount of solvent, then it is less concentrated or more dilute. The terms diluted and concentrated are related to each other. These words are used to compare certain solutions to each other, since there is nothing like numbers, these words are relative to one another.

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Period 6 is unusual in several ways.(a) It is the longest period in the table. How many elements belong to Period 6? How many me

Nookie1986 [14]

Period 6 is unusual in several ways.

Lanthanum (La), hafnium (Hf), tantalum (Ta), tungsten (W), rhenium (Re), osmium (Os), iridium (Ir), platinum (Pt), gold (Au), and mercury are the period 6 transition metals (Hg).

<h3>Why Period 6 is unusual ?</h3>

The group of fifteen metallic chemical elements with atomic numbers 57 through 71, from lanthanum to lutetium, is known as the lanthanide or lanthanoid series (IUPAC nomenclature).

The phrase "rare-earth elements" refers to these fifteen elements as well as the chemically related elements scandium and yttrium.

Because it comprises a maximum of 32 elements, the sixth period is referred to be the longest period.

The nonmetals oxygen (O), sulfur (S), and selenium (Se), as well as the metalloid tellurium ( Te ) and the metal polonium, are classified as chalcogens in group 6A (or VIA) of the periodic table (Po).

The periodic table has a group of elements designated as Group 6 in IUPAC style. Chromium, molybdenum, tungsten, and sea-borgium are its constituent elements. While chromium, molybdenum, and tungsten are refractory metals, all of these are transition metals.

To know more about Periodic table please click here : brainly.com/question/15987580

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5 0

2 years ago

(LO 37,45) A reaction is 75% complete in 45.0 min. How long after its start will the reaction be 50% complete if it is (A) first

seropon [69]

Answer:

A) t = 22.5 min and B) t = 29.94 min

Explanation:

Initial concentration, [A]₀ = 100

Final concentration = 100 -75 = 25

Time = 45 min

A) First order reaction

ln[A] − ln[A]₀ = −kt

Solving for k;

ln[25] − ln[100] = - 45k

-1.386 = -45k

k = 0.0308 min-1

How long after its start will the reaction be 50% complete?

Initial concentration, [A]₀ = 100

Final concentration, [A] = 100 -50 = 50

Time = ?

ln[A] − ln[A]₀ = −kt

Solving for k;

ln[50] − ln[100] = - 0.0308 * t

-0.693 = -0.0308 * t

t = 22.5 min

B) Zero Order

[A] = [A]₀ − kt

Using the values from the initial reaction and solving for k, we have;

25 = 100 - k(45)

-75 = -45k

k = 1.67 M min-1

How long after its start will the reaction be 50% complete?

Initial concentration, [A]₀ = 100

Final concentration, [A] = 100 -50 = 50

Time = ?

[A] = [A]₀ − kt

50 = 100 - (1.67)t

-50 = - 1.67t

t = 29.94 min

3 0

3 years ago

Which bond is least polar? As-Cl, Bi-Cl, P-Cl, N-Cl

Lady_Fox [76]

Uhh don't know about that

3 0

3 years ago

In the following reaction: HCO3- (aq) + H2O (aq) → H2CO3 (aq) + OH- (aq)

Basile [38]

Answer:

The correct option is H₂O is an acid and OH⁻ is its conjugate base.

Explanation:

According to the Bronsted-Lowry theory, an acid is a substance capable of yielding a hydrogen ion while a base is a species capable of accepting a hydrogen ion.

A conjugated acid-base pair is a pair of chemical species capable of transforming into each other by exchange of a proton. That is, a conjugated acid is the species that forms after the base accepts a proton. In contrast, a conjugate base is the species that forms after an acid donates its proton.

So, in this case water acts as an acid, yielding a proton to HCO₃⁻, which in turn acts as a base.

<u><em>The correct option is H₂O is an acid and OH⁻ is its conjugate base.</em></u>

4 0

3 years ago

Which describes order of the energy transformations that occur in a hydroelectric power plant? The kinetic energy of water is tr

katovenus [111]

Answer:

This mechanical energy is used by the generator to create electrical energy

Explanation:

4 0

3 years ago