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zloy xaker [14]
3 years ago
8

When a chemical change occurs, new what is formed

Chemistry
2 answers:
lys-0071 [83]3 years ago
5 0
You get different molecules for example molecules in liquids are different from molecules in solids or gases
faltersainse [42]3 years ago
3 0
New m<span>olecules are formed.

If this helped and you have any other questions, feel free to comment on my wall. Hope this helped.
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Maria formed when asteroids punctured the moon's surface ,allowing magma to bleed out and create?
dlinn [17]
The answer that best completes the statement above is EXTENSIVE LAVA FLOW. Maria is the name that refers to an asteroid family. And this has punctured the surface of the moon which created magma to bleed out and resulted in an extensive lava flow. Hope this answer helps.
5 0
3 years ago
Read 2 more answers
What do you think happens to the matter in a food sample as it is burned?
Alika [10]

Burning and other changes in matter do not destroy matter. The mass of matter is always the same before and after the changes occur. The law of conservation of mass states that matter cannot be created or destroyed

6 0
3 years ago
Cyclobutane, C4H8, consisting of molecules in which four carbon atoms form a ring, decomposes, when heated, to give ethylene. Th
frosja888 [35]

Answer:

The concentration of cyclobutane after 875 seconds is approximately 0.000961 M

Explanation:

The initial concentration of cyclobutane, C₄H₈, [A₀] = 0.00150 M

The final concentration of cyclobutane, [A_t] = 0.00119 M

The time for the reaction, t = 455 seconds

Therefore, the Rate Law for the first order reaction is presented as follows;

\text{ ln} \dfrac {[A_t]}{[A_0]} = \text {-k} \cdot t }

Therefore, we get;

k = \dfrac{\text{ ln} \dfrac {[A_t]}{[A_0]}}  {-t }

Which gives;

k = \dfrac{\text{ ln} \dfrac {0.00119}{0.00150}}  {-455} \approx 5.088 \times 10^{-4}

k ≈ 5.088 × 10⁻⁴ s⁻¹

The concentration after 875 seconds is given as follows;

[A_t] = [A₀]·e^{-k \cdot t}

Therefore;

[A_t] = 0.00150 × e^{5.088 \times 10^{-4} \times 875}  = 0.000961

The concentration of cyclobutane after 875 seconds, [A_t] ≈ 0.000961 M

6 0
3 years ago
What is the relationship between pH, acidity, and H1 concentration ?
irina [24]
PH = - log [concentration of H+]    

pH = - log [H+]

pH IS A MEAUSE OF ACIDITY AND BASIDITY OF A SUBSTANCE....

AS ACIDITY OF A SUBSTANCE DEPENDS ON THE IONISATION OF H+
THEREFORE IT IS A MEAUSE...

THE LOWER THE PH VALUE, THE MORE ACIDIC IS THE SUBSTANCE

6 0
3 years ago
A dozen is a counting unit that refers to 12 and a pair is a counting unit that refers to
seraphim [82]

Answer: 1 mol contains 6.02214076×1023 of the specified particles

Explanation:

Usually its easier to work with moles using grams of what you are counting for example: 1 mole of carbon is equal to 12 grams 1 mole of oxygen is equal to approximately 16 grams and so on.

8 0
3 years ago
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