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3 years ago

The phase of matter can be changed by:

Chemistry

2 answers:

777dan777 [17]3 years ago

7 0

The phases of matter are changed by temperature and pressure

kari74 [83]3 years ago

3 0

Answer : The phase of matter can be changed by pressure and temperature.

Explanation :

As we know that there are three states of matter which are solid, liquid and gaseous state.

Solid state : In this state, the molecules are arranged in regular and repeating pattern and are closely packed that means they are fixed and vibrate in place but they can not move from one place to another.

Liquid state : In this state, the molecules are present in random and irregular pattern and are closely packed but they can move from one place to another.

Gaseous state : In this state, the molecules are present in irregular pattern and are not closely packed and they can move freely from one place to another and spread out.

From this we conclude that, the arrangements of all the phase of matter can be changed by applying the pressure and temperature. That means,

By applying the pressure and temperature, the solid phase can be changed into liquid or gaseous state or liquid into solid or gaseous or gas into liquid or solid.

Hence, the phase of matter can be changed by pressure and temperature.

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Infer why the brown marmarated stink bug (BMSB) is an invasive species in the United States.

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Answer:

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Explanation:

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2 years ago

Saturated aqueous sodium chloride(d=1.2g/mL) is added to the following mixtures in order to dry the organic layer. Which layer i

natali 33 [55]

(a) at the bottom - high density organic compound dissolved in methylene chloride

(b) at the bottom - saturated aqueous sodium chloride

Explanation:

Sodium chloride is dissolved in water while the organic compounds are dissolved in methylene chloride. After mixing the two solutions two layers will form because water (polar molecule) will not mix with the methylene chloride (nonpolar molecule).

The layer with higher density will be at the bottom.

(a) saturated aqueous sodium chloride (d = 1.2 g/mL) - upper layer

high density organic compound dissolved in methylene chloride (d = 1.4 g/mL) - bottom layer

(b) saturated aqueous sodium chloride (d = 1.2 g/mL) - bottom layer

low density organic compound dissolved in methylene chloride (d = 1.1 g/mL) - upper layer

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3 years ago

Use the periodic table to determine what element cesium-135 () becomes after beta decay.

bonufazy [111]

Answer:

D. $_{56}^{135}\text{Ba}$

Explanation:

Your unbalanced nuclear equation is

$_{55}^{135}\text{Cs} \longrightarrow ? + _{-1}^{0}\text{e}$

It is convenient to replace the question mark by an atomic symbol, $_{x}^{y}\text{Z}$ , where x = the atomic number, y = the mass number, and Z = the symbol of the element .

Then your equation becomes

$_{55}^{135}\text{Cs} \longrightarrow _{x}^{y}\text{Z} + _{-1}^{0}\text {e}$

The main point to remember in balancing nuclear equations is that the sums of the superscripts and the subscripts must be the same on each side of the equation.

Then

55 = x - 1, so x = 55 + 1 = 56

135 = y + 0, so y = 135

Element 56 is barium, so the nuclear equation becomes

$_{55}^{135}\text{Cs} \longrightarrow _{56}^{135}\text{Ba} + _{-1}^{0}\text{e}$