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3 years ago

Explain why gases condense when they are cooled

2 answers:

8 0

We can explain this in a molecular level. We know that the difference between a gas and a liquid of the same composition is how fast their molecules are moving. So given a gas, their molecules are farther and faster when moving, but when they are cooled their bulk kinetic energy decreases. In other words their molecules start to move closer and move slower until it behaves more like a liquid molecule. This is the time when gases condense

Sindrei [870]3 years ago

4 0

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Carbon and silicon are tetravalent but ge sn pb show di valency. Why

Anuta_ua [19.1K]

Answer:

Carbon and silicon both are tetravalent elements as compared to germanium, tin, and lead which are divalent.

That's because Ge, tin, and Pb show inert pair effect and has a greater nuclear effective charge on the 's' electrons due to poor shielding effect. .That's why these elements are not able to share their valence electrons while carbon and silicon does and show "catenation" which is the ability to form long chain molecules.

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4 years ago

In a cathode ray tube, the number of electrons that reach the fluorescent screen is controlled by the

lutik1710 [3]

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The cathode serves as the positive terminal and the anode as the negative terminal. The flow of electrons is from the cathode to the anode.The relationship between a cathode and an anode involves electrons. An example of this is reaction that takes place in an electrolytic cell. It has a cathode compartment, an anode compartment and a salt bridge that divides the compartment. The movement of electrons is from the cathode to the anode.

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4 years ago

Atoms of sg are very unstable, and it is therefore difficult to study this element's properties. based on the position of sg in

ale4655 [162]

All " transuranium elements " ( i.e. an atomic number greater than 92 ) are unstable. Elements in the same family have similar properties. Based on this logic, one would expect seaborgium ( Sg ) to have similar properties to tungsten ( W ), which is directly above it in the same family.Elements of atomic mass 92 and above being most unstable called the transuranium group of elements is found to have many common properties and becomes difficult to judge on the basis of properties. Atomic number is the number of protons in the nucleus of the atom and it describes the chemical property of the elements.

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4 years ago

The atomic masses of 35-Cl (75.53 percent) and 37-Cl (24.47 percent) are 34.968 amu and 36.956 amu, respectively. Calculate the

AlladinOne [14]

Answer:

35.45 amu is the average atomic mass of chlorine.

Explanation:

The average atomic mass is given :

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$

Atomic mass of 35-Cl = 34.968 amu

Percentage abundance of 35-Cl = 75.53%

Fractional abundance of 35-Cl = 0.7553

Atomic mass of 37-Cl = 36.956 amu

Percentage abundance of 37-Cl = 24.47%

Fractional abundance of 37-Cl = 0.2447

Average atomic mass of chlorine:

$=34.968 amu\times 0.7553+36.956 amu\times 0.2447=35.45 amu$

35.45 amu is the average atomic mass of chlorine.

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4 years ago

Fill in the blanks to describe the work of Ben Kennedy, a volcanologist who works in New Zealand. To learn more about why his pu

tekilochka [14]

Answer:

1)- foam

2)- bubbles

3)- tension

Explanation:

5 0

3 years ago

Read 2 more answers