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DiKsa [7]
3 years ago
11

the reaction of zinc with copper surface is exothermic. how can you tell from the students results that the reaction is exotherm

ic?
Chemistry
1 answer:
Airida [17]3 years ago
6 0

Answer:

the tempeture increases

Explanation:

Zn(s) + CuSO4(aq) � ZnSO4(aq) + Cu(s) An important aspect of these experiments is that they are exothermic.

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PLEASE HELP. !!
scoray [572]

Answer:

Potential energy = 441 N

Explanation:

Given:

Mass M = 15 kg

Height = 3 m

Find:

Potential energy

Computation:

Potential energy = mgh

Potential energy = (15)(9.8)(3)

Potential energy = 441 N

8 0
3 years ago
Potassium chloride and water for from the reaction of an acid base THEREFORE KCI is a .....
nordsb [41]
It is a salt and salt salt and
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3 years ago
A set of aqueous solutions are prepared containing different acids at the same concentration: acetic acid, chloric acid and hydr
navik [9.2K]

Answer:

The solutions of hydrobromic acid and of chloric acid are the most electrically conductive.

Explanation:

The electrical conductivity of a solution is determined by the concentration of ions in the solution. The acids listed react with water to form ions. In the case of hydrobromic acid, for example, the reaction is as follows:

HBr + H2O >> H3O(+) + Br(-)

Hydrobromic acid and chloric acid are strong acids, meaning the reaction is considered to proceed at 100%. Acetic acid, however, is a weak acid and the reaction with water does not go to completion, so there are less ionic species in the solution of acetic acid, which makes it less electrically conductive.

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3 years ago
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nikitadnepr [17]

Tachyon is not a particle.

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4 years ago
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Why are electrons restricted to specific orbitals?
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The answer lies in the concept of quantum mechanics. Every single electron of an atom has its own unique set of quantum numbers. It is stated in the Pauli Exclusion principle that no two electrons would have the same quantum numbers. That is why each electron occupies a specific orbital. In addition to the Pauli Exclusion Principle, the other laws and principles that help set the quantum numbers are the Aufbau Principle and the Hund's rule.
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