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3 years ago

Explain why metals are good conductors of electric current.

2 answers:

8 0

Metals are good conductors because the molecules that are inside the metal are tightly packed together. This is why the heat moves through the metal quickly.

Phantasy [73]3 years ago

5 0

For example, copper is used for electrical wiring because it is a good conductor of electricity. Metal particles are held together by strong metallic bonds, which is why they have high melting and boiling points. The free electrons in metals can move through the metal, allowing metals to conduct electricity.

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How easily one thing dissolves into another defines what term?

bogdanovich [222]

That is b, solubility

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3 years ago

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What is fry's reagent used for?

dmitriy555 [2]

Fry's Reagent a chemical used on metals such as firearms, it corrodes them and allows you to see the etching that could have been scratched off by the criminal, such as the serial number of the gun. It is a chemical that can restore a serial number that has been removed from a gun by dissolving the area that has been flattened when the number was stamped on.

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3 years ago

Write the complete nuclear symbol for a nucleus of oxygen with 8 protons & 10 neutrons?

Sav [38]

Answer: The complete nuclear symbol will be $_8^{18}\textrm {O}$

Explanation:

The nuclear symbol is written as: $_Z^A\textrm {X}$ where Z= atomic number , A = mass number X = symbol of element

Atomic number is defined as the number of protons or number of electrons that are present in an atom.

For an electrically neutral atom,

Atomic number = Number of electrons = Number of protons = 8

Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

Mass number = Number of protons + Number of neutrons

Mass number = 8 + 10 = 18

Thus complete symbol will be $_8^{18}\textrm {O}$

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2 years ago

Please help!! I think this is true but I really need help.

Dennis_Churaev [7]

False, because generally forensics collect the evidence to make sure the evidence doesn’t get damaged or tainted.... hope this helps

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3 years ago

Write a condensed structural formula for the repeat unit of the Kevlar molecule

shusha [124]

Explanation:

Kevlar is a fiber which is used in making of bullet proof vests and armors. It is a co-polymer which is formed by condensing two organic molecules 1,4-phenylene-diamine and terephthaloyl chloride.

$NH_2C_6H_4NH_2+Cl-(CO)-C_6H_4-(CO)-Cl\xrightarrow[-2HCl]{ }$

$NH_2-C_6H_4-NH-CO-C_6H_4-COOH$

For Structure refer to image attached.

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3 years ago

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