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2 years ago

The diagrams below represent the four states of matter.

Chemistry

2 answers:

UkoKoshka [18]2 years ago

6 0

Diagram 1 exhibits the nature of the particles within the state that forms after a solid melts. Solids melt into liquids and the particles within a liquid have a greater spacing than the particles in a solid. Moreover, these particles are free to slip over one another, which means that liquids do not have a definite shape; however, the particles are still confined in by intermolecular forces, which means that the volume of a liquid is definite.

anastassius [24]2 years ago

3 0

Answer: Diagram 1 (with the blue balls).

Explanation:

1) After the solids melt they are liquids.

Liquid state is characterized by the particles being close but yet free to move, they can slip over each other, which is what permit the liquids flow and take the shape of the containter.

2) Solid is the state of the matter in which the particles are stuck together, they cannot move with respect to the others, but they are in fixed positions. In this state the particles vibrate and the matter has a definite shape and volume.

This state is represented by the diagram 3 (the red balls).

3) In gas state the particles are quite separated, free to move in and occupy all the space. In this state the particles are moving at great speed. The volume of the gas is the volumen of the container.

This state is represented by the diagram 2(the yellow balls).

4) Plasma is the state of the matter similar to gas state but the particles are ions. Those are particles that have charge, either positive or negative.

This is represented by the diagram 4 (the balls with positive and negative symbols).

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Brut [27]

B cause it tells how it moves

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3 years ago

Five pulses are generated every 0.112 s in a tank of water. What is the speed of propagation of the wave if the wavelength of th

DedPeter [7]

Answer:

The answer to the question is

The wave speed is 53.57 cm/s

Explanation:

The speed of a wave is the distance covered by the wave per unit time.

Wave speed is given by

v = f×λ

where v = The velocity of the wave

f = The wave frequency

λ = The wavelength of the wave

the speed v of the wave can also be expressed interms of the period as

v = λ/T

The freuency of the given wave is f = 5/(0.112 s) = 44.64 Hz and the wavelength is λ = 1.20 cm

Therefore the speed of the wave = 44.64 Hz × 1.20 cm = 53.57 cm/s

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3 years ago

How many grams of mgcl2 is produced if 4. 67 moles of hcl react

frosja888 [35]

The mass of MgCl₂ produced is 5.685 grams.

Mass is the quantity of matter of a physical body.

The reaction is

Mg + 2HCl → MgCl₂ + H₂

2 mole of HCl

(2 × 36.458) = 72.8 g

1 moles of MgCl₂

(1 × 95.21 g) = 95.21 g

1 g Mg will produce = $\dfrac{95. 21}{78.2}$

4.67 mol Mg will produce

$\dfrac{95. 21}{78.2} \times 4.67 = 5.685$

Thus, the mass of MgCl₂ produced is 5.685 grams.

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1 year ago

Which substance would most likely need to cool to the lowest temperature before it condenses?

lozanna [386]

b. ethane (C2H6), a nonpolar covalent compound

Explanation:

The substance that would most likely need to cool to the lowest temperature before it condenses is ethane, a non-polar covalent compound.

Ethane in liquid form has very weak attractive forces binding the molecules together.

To form and change state, all the molecules must be brought very close together under very high pressure and low temperature. Else, they will not attract one another.

Ionic crystal lattice forces as seen in KBr are strong attractive forces. As a substance such as KBr begins to condense, they begin to attract one another with a very strong force even before they cool to their least temperature.
Ammonia has strong intermolecular hydrogen bonds in its structure which binds them together. The attraction is great between the hydrogen of one molecule and the nitrogen of another.
In ethane we have a weak attraction.

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3 years ago

Read 2 more answers

determine the pressure in kpa of hydrogen gas produced when 29.51g of aluminum reacts with excess sodium hydroxide and water if

Mashcka [7]

The pressure of hydrogen gas is 276.25 Kpa .

Given,

Mass of aluminum = 29.51g

Temperature (T) = 25.67 degC =298.67 K

Volume (V) = 14.75 L

The required equation when aluminum reacts with excess sodium hydroxide and water is given by ,

2Al + 2NaOH + 2H2O ==>2NaAlO2 + 3H2

molecular mass of aluminum =26.98 g

1 mole of aluminum= 26.98g

2 moles of aluminum = 53.96g

2 mole of aluminum produces = 3 moles of hydrogen gas

53.96 g of aluminum produces = 6 g of hydrogen gas

29.51 g of aluminum produces = 6*(29.51) /53.96 =3.28 g of hydrogen gas

Thus ,

2 g of hydrogen gas = 1 mole of hydrogen

3.28 g of hydrogen gas = 3.28/2 mole =1.64 mol of hydrogen

Thus , n = 1.64 mol

According to ideal gas equation ,

PV=nRT

P=nRT/V

P = 1.64 * (0.0821L atm K^-1mol^-1 ) *(298.67 K)/14.75L

P=2.726 atm

P= 276.25 Kpa

Hence the pressure of hydrogen gas is 276.25 Kpa .

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1 year ago