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3 years ago

A substance that prevents the flow of electric current is a(n) .

Chemistry

2 answers:

Dmitriy789 [7]3 years ago

6 0

Answer:

Insulator

Explanation:

An insulator does not conduct electricity. Insulators offer high resistance to the free flow of electron. Rubber is a good insulator.

A conductor conducts electricity. Metals are good conductors of electricity. Metals have free flowing electrons that allow them to conduct electricity. As metals conduct electricity they have a distribution of charge on its surface.

nasty-shy [4]3 years ago

4 0

An Insulator.

Insulators prevent flow of electric current. Example is wood, clay.

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Select the true statement about the diagram.

Anvisha [2.4K]

Answer:

The answer is A, It shows an exothermic overall reaction.

Explanation:

5 0

3 years ago

Iron (Fe) has three isotopes. Calculate the average atomic mass of the element Fe using the following data: Isotope atomic mass

Maksim231197 [3]

Answer:

Average atomic mass = 55.83 amu

Explanation:

The formula for the calculation of the average atomic mass is:

$Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})+(\frac {\%\ of\ the\ third\ isotope}{100}\times {Mass\ of\ the\ third\ isotope})$

Given that:

For first isotope, Fe-54:

% = 6 %

Mass = 53.94 amu

For second isotope, Fe-56:

% = 92 %

Mass = 55.93 amu

For third isotope, Fe-57:

% = 2 %

Mass = 56.94 amu

Thus,

$Average\ atomic\ mass=\frac{6}{100}\times {53.94}+\frac{92}{100}\times {55.93}+\frac{2}{100}\times {56.94}$

<u>Average atomic mass = 55.83 amu</u>

5 0

3 years ago

Which radioisotope is used in dating geological formations?i-131u-238ca-37fr-220?

Nostrana [21]

The radioisotope U-238 is primarily used in dating geologic formation. This method is used for dating sediments from either a marine or playa lake environment. Because this method is used for the period between 100,000 years and 1,200,000 years before the present, it aids in bridging the gap between the carbon-14 dating method and the potassium-argon dating method.

6 0

3 years ago

What form of oxygen is not toxic to microorganism is it oh-?

Aleks04 [339]

The correct answer would be O
2

7 0

3 years ago

Density of 2.7 g/ml and volume of 35.6 ml what is the mass

Anettt [7]

The math is set up like

35.6 ml * 2.7 g/ 1 ml

which will leave you with

96.12 g

3 0

3 years ago