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daser333 [38]
3 years ago
15

Sulfur (S) and oxygen gas (02) undergo a chemical reaction to form sulfur trioxide (SO3).

Chemistry
1 answer:
Dvinal [7]3 years ago
8 0

Answer:

C

Explanation:

I just think it is the right answer :) Sorry if I am wrong..

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A chemist prepares a solution of fluoride (MgF2) by measuring out 0.0191 ųmol of magnesium fluoride into a 400. mL volumetric fl
Vladimir79 [104]

Answer:

The answer to your question is:  0.05 M

Explanation:

I'm not sure about the units umol, I think is units mol.

Data

MgF2 = 0.0191 mol

Volume = 400 ml

Molarity = moles / volume

Molarity = 0.0191 / 0.4 l

Molarity = 0.048 ≈ 0.05 M

5 0
3 years ago
Place the following elements of the scale below from lowest energy ties energy
BARSIC [14]
Li, Na, K, Ca, Fe, Cu, Sr
7 0
3 years ago
In a solution of H2SO4, rank the concentration of H2SO4, H+, SO42- from highest concentration to lowest concentration.
Softa [21]

Answer:

  • [H⁺] > [SO₄²⁻] > [H₂SO₄]

Explanation:

H₂SO₄ is a strong acid, which means that most of it ionizes in aqueous solution.

Since it is a diprotic acid (two hydrogen ions) its ionization occurs in two steps:

  • H₂SO₄ (aq) → H⁺(aq) + HSO₄⁻(aq)

  • HSO₄⁻ (aq) → H⁺(aq) + SO₄²⁻(aq)

Thus, almost all H₂SO₄ has ionized and its final concentration is almost nothing.

After the first ionization, the conentrations of H⁺(aq) and HSO₄⁻ are equal but by the second ionization more H⁺ ions are produced along with SO₄⁻.

You can show it as one step dissociation, assuming 100% dissociation (given this is a strong acid):

By the stequiometry you can build this table:

                 H₂SO₄ (aq) → 2H⁺(aq) + SO₄²⁻(aq)

Initial                A                 0              0

Change           - x               +2x          +x

Equilibrium       A - x           2x             x

As explained, A - x is very low, and 2x is twice x. Thus,

The rank of the concentrations from highest to lowest is:

  • [H⁺] > [SO₄²⁻] > [H₂SO₄]

5 0
3 years ago
Ruben slides a book across the floor. Eventually the book will stop moving.
Andreas93 [3]
The answer is B: friction.

A definition of friction is a resistance of an object against another, for example a tire against mud, the tire would add friction against the mud to pull away from it.

I don’t need brainliest but please just mark thanks to this answer that would help me a lot, have a nice day :)
7 0
3 years ago
HELP ME PLEASE 18 points
Paha777 [63]
Intelligence is the ability to acquire and apply knowledge and skills. Intelligence is acquired by learning things over time, mostly influenced by learning from experience over time.
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