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lys-0071
2 months ago
7

A rod, X has a positive charge of 8. An otherwise identical rod, Y has a negative charge of 4. The rods are touched together, an

d then separated.
1.When they touch, what particles move between them?

2.Did the particles move from "X" or "Y" or from "Y" to "X"?
Chemistry
1 answer:
Anarel [2.9K]2 months ago
4 0

Answer:

1.  electrons

2. From "Y" to "X"

Explanation:

1. Electrons shift between the rods since they are the sole charge carriers capable of movement.

2. The movement occurs from "Y" to "X" as the electrons are the only charge carriers that are free. The positive charge on rod X arises from a lack of electrons, while rod Y's negative charge results from an excess of electrons. When the rods connect, electrons flow from "Y" to "X" since they are the only charge carriers that can move freely.

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A pan containing 20.0 grams of water was allowed to cool from a temperature of 95.0 °C. If the amount of heat released is 1,200
castortr0y [3046]

Answer:

81°C.

Justification:

We can arrive at this conclusion using the formula:

Q = m.c.ΔT,

where Q denotes the heat lost by water (Q = - 1200 J).

m represents the mass of water (m = 20.0 g).

c indicates the specific heat of water (c = 4.186 J/g.°C).

ΔT signifies the difference between the starting temperature and the final temperature (ΔT = final T - initial T = final T - 95.0°C).

Given Q = m.c.ΔT

It follows that (- 1200 J) = (20.0 g)(4.186 J/g.°C)(final T - 95.0°C ).

(- 1200 J) = 83.72 final T - 7953.

∴ final T = (- 1200 J + 7953)/83.72 = 80.67°C ≅ 81.0°C.

Consequently, the correct answer is: 81°C.

7 0
3 months ago
Magnesium metal burns with a bright white flame. What conclusions can you draw about the electron transitions that can take plac
alisha [2963]

Different wavelengths are involved.

Explanation:

When magnesium ignites with a bright white flame, it indicates that various wavelengths are related to the electron transitions occurring in the magnesium atom.

  • Upon combustion, the electrons within the atom become excited.
  • They emit characteristic light that corresponds to their energy levels.
  • White light consists of a mix of different wavelengths.
  • Seeing white light implies that multiple wavelengths combined are responsible for the observed emission.

Learn more:

Spectrum

3 0
3 months ago
In KCI how are the valence electrons distributed
eduard [2782]

Answer:

Explanation:

In KCl, the two elements that combine to create KCl are potassium (K) and chlorine (Cl).

Potassium, as a Group 1 element, possesses one valence electron in its outermost shell which it readily donates during bonding. Every element aims to achieve a stable electron configuration, typically with 2 or 8 electrons in its outer shell. Potassium is characterized by its lower electronegativity and higher ionization energy, making it more likely to donate its electron than to accept one. On the other hand, chlorine belongs to Group 17 and has 7 electrons in its outer shell, requiring just one additional electron to complete its octet. Chlorine’s higher electronegativity and lower ionization energy facilitate its tendency to accept an electron rather than donate it.

The bond between potassium and chlorine that results in KCl is termed an electrovalent bond.

Reaction equation:

K + Cl → KCl

3 0
3 months ago
Identify the number of moles in 369 grams of calcium hydroxide. Use the periodic table and the polyatomic ion resource.
Alekssandra [3086]

Response: The moles in 369 grams of calcium hydroxide are 4.98 moles

Reasoning: Given,

Mass of calcium hydroxide = 369 g

Molar mass of calcium hydroxide = 74.093 g/mole

Formula used:

\text{Moles of calcium hydroxide}=\frac{\text{Mass of calcium hydroxide}}{\text{Molar mass of calcium hydroxide}}

Now substituting the provided values into this formula, you will find the moles of calcium hydroxide.

\text{Moles of calcium hydroxide}=\frac{369g}{74.093g/mole}=4.98mole

Thus, the number of moles in 369 grams of calcium hydroxide is, 4.98 moles

7 0
2 months ago
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