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gayaneshka [121]
3 years ago
5

How does silicon shape our technological reality?

Chemistry
1 answer:
Georgia [21]3 years ago
4 0
Silicon is the most common element used in electronic devices. They are commonly termed as silicon wafers when incorporated into these electronics. Its beneficial property for this use is being a semi-conductor. It can be combined with other conductors through a process called doping, to make it ideal for making transistors that could amplify electric signals.
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Determine the number of protons and neutrons in plutonium-239 and enter its symbol in the form azx.
Komok [63]
Answer:

number of protons: 94
number of neutrons: 145

  239
       Pu
   94

Explanation:

1) The atomic number, Z, of plutonium is Z = 94, i.e plutonium 94 protons

2) Plutoniun-239 is the isotope with mass number 239.

3) Mass number = number of protons + number of neutrons =>

number of neutrons = mass number - number of protons = 239 - 94 = 145

4) The notation requires that you indicate the symbol of the element with the atomic number (number of protons) and the mass number.

You put the mass number as a superscript at the left side of the symbol and the atomic number as subscript to the left of the symbol.

So, in this case the symbol is Pu, the superscript to the left is 239 and the subscript to the left is 94.

  239
       Pu
   94


7 0
3 years ago
What is kinetic energy​
il63 [147K]

Answer:

kinetic energy is the energy of movement

Explanation:

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4 0
3 years ago
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A layer of paint can be used to prevent iron rusting true or false​
Goshia [24]

Answer:

true

Explanation:

This layer will prevent moisture from reaching the metal and therefore prevent rust. oil paint especially

4 0
3 years ago
A sample of argon (Ar) gas has a volume of 7.31 L at a pressure of
Pie

Answer:

17.1 L

Explanation:

P1V1/T1  =  P2V2/T2        T is in K

P1V1/T1 * T2/P2 = V2

735 * 7.31 / (45+273.15)  * (55+ 273.15)/325 = V2

V2 = 17.1 L

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2 years ago
The kinetic energy within molecules of an object when heat is added
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As an object is heated up, its atoms and molecules move and collide faster. Geothermal energy is the thermal energy in the earth. Wind. ... total kinetic energy of the particles hat make up a substance.

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