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kondaur [170]
2 years ago
13

Describe what occurs to the particles of a substance when the substance melts. Explain why this occurs.

Chemistry
1 answer:
GuDViN [60]2 years ago
7 0

Explanation:

As a substance melts, and goes from a solid to a liquid state, the kinetic energy of the molecules increases, and the molecules move faster, and they separate further and further away from each other. The intermolecluar forces holding the molecules together become weaker

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Changing the number of protons in an atom makes<br><br> A. an ion<br> B. an isotope
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A. an ion

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How do the bonds differ in<br> each type?
VashaNatasha [74]

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Bonds basically differs with each other due to sharing of electrons .

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The solubility of oxygen gas in water at 40 ∘c is 1.0 mmol/l of solution. What is this concentration in units of mole fraction?
juin [17]

The formula for mole fraction is:

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The solubility of oxygen gas = 1.0 mmol/L  (given)

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Converting mmol to mol:

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For moles of water:

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Density = \frac{mass}{volume}

Mass = 1.0 g/ml\times 1000 mL = 1000 g

So, the mass of water is 1000 g.

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Number of moles of water = \frac{1000 g}{18 g/mol} = 55.55 mol

Substituting the values in formula (1):

mole fraction = \frac{0.001}{55.55+0.001}

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Hence, the mole fraction is 1.8\times 10^{-5}.

7 0
3 years ago
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blagie [28]

Answer:

The answer is attached below

Explanation:

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