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Karo-lina-s [1.5K]
3 years ago
7

The particles of a solid are linked together in a network. If the temperature of the solid increases, the particles gain energy.

If they gain enough energy, the particles can break free of the network. Then, they are able to move around more freely.
In the event described above, what kind of change is taking place?
A.
a physical change
B.
neither a physical nor a chemical change
C.
a chemical change
D.
both a physical and a chemical change
Chemistry
2 answers:
Ray Of Light [21]3 years ago
8 0
Both A and B hope I helped sorry if it’s wrong
Phantasy [73]3 years ago
4 0
Both a physical and a chemical change
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What is the process of separating liquids by boiling points?
Alona [7]

Answer:

Fractional distillation (often shortened in high school to just distillation)

Explanation:

Some elements have different boiling points and can be separated by boiling one element out and condensing it. This is how sodium acetate is made, for example.

Hope this helped!

7 0
3 years ago
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What volume in liters of carbon dioxide will be produced by the reaction of 18.5 liters of oxygen gas at STP?
agasfer [191]

Answer:

0.16 L

Explanation:

Step 1: Write the balanced equation

C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(g)

Step 2: Calculate the moles of CO₂ produced from 0.012 moles of O₂

The molar ratio of O₂ to CO₂ is 5:3. The moles of CO₂ produced are 3/5 × 0.012 mol = 0.0072 mol.

Step 3: Calculate the volume occupied by 0.0072 moles of CO₂ at standard temperature and pressure

At STP, 1 mole of CO₂ occupies 22.4 L.

0.0072 mol × 22.4 L/1 mol = 0.16 L

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8 0
2 years ago
A chemistry student needs 45.0mL of pentane for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the stud
Masja [62]

The mass of pentane the student should weigh out is

The density of pentane is 0.626 gcm-3

To calculate the mass of pentane following expression is used,

(Density is defined as the mass divide by volume)

Density = mass / volume

mass of pentane = Density of pentane * Volume of pentane

mass of pentane = 0.626 gcm-3 * 45.0 mL

                             = 28.17 g

Here the unit of mass of pentane is g,

However the unit of density is gcm-3 and unit of volume is mL i.e. cm3

Hence,   Mass = gcm-3 * cm3

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The mass of pentane the student should weigh out is 28.17g

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5 0
2 years ago
EQUILIBRIUM Two moles of compound P were placed in a vessel. The vessel was heated and compound P was partially decomposed to pr
Reika [66]

As given:

Initial moles of P taken = 2 mol

the products are R and Q

at equilibrium the moles of

R = x

total moles =  2 + x/2

Let us check for each reaction

A) P <-> 2Q+R

Here if x moles of P gets decomposed it will give 2x moles of Q and x moles of R

So at equilibrium

moles of P left = 2- x

moles of Q = 2x

moles of R = x

Total moles = (2-x) + 2x + x = 2 +2x

B) 2P <-> 2Q+R

Here x moles of P will give x moles of Q and x/2 moles of R

So at equilibrium

moles of P left = 2- x

moles of Q = x

moles of R = x/2

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C) 2P <-> Q+R

Here x moles of P will give x/2 moles of Q and x/2 moles of R

So at equilibrium

moles of P left = 2- x

moles of Q = x /2

moles of R = x/2

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D) 2P <-> Q+2R

Here x moles of P will give x/2 moles of Q and x moles of R

So at equilibrium

moles of P left = 2-x

moles of Q = x/2

moles of R = x

Total moles = (2-x) + x/2 + x = 2 + x/2

3 0
3 years ago
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Rus_ich [418]
Because it has a smaller atomic number. Elements are not lined up according to the higher average atomic mass, but rather according to the higher atomic number.
7 0
3 years ago
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