Chemistry High School


20 points
Which of the following objects below is NOT needed to test electrical conductivity?
battery
object powered by electricity
insulated wire
electrical tape

Answers

Answer 1

Answer:

I`m pretty sure it`s electrical tape.

Explanation:

Answer 2

The objects which does not conduct electricity are called insulators which are not needed to test electrical conductivity. Hence, insulated wire is the correct option.

What is conductivity ?

Conductivity of a substance is the ability to conduct electrically or thermally through the substance. Based on their conductivity, there are three classes of materials conductors, semiconductors and insulators.

Conductors are materials conducting heat and electricity at all temperatures. Semiconductors conduct only at higher temperature or on doping. Insulators are material does not conduct at any condition.

Metals are good conductors. Silicon , germanium etc. are semiconductors. Whereas, wood, plastic etc. are insulators they does not allow flow of electrons through it. Therefore, an insulated wire is not needed to test conductivity.

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Related Questions


6. How many molecules are in 2.7 moles of carbon dioxide

Answers

Answer:

2.7×6.022×10^23

=16.594×10^23 moleclules

Explanation:

number of mol= 2.7

1 mol of any element=6.022×10^23

therefote 2.7 mol =2.7×6.022×10^23

=16.594×10^23

A mole is -6.022 • 10 to the 23 power of something.

So, saying you have a mole of iron atoms is like saying you have 6.022 • 10 to the 23 power iron atoms

There for you have 1.63 • 10 to the 24 power

Describe the structure or shape of DNA

Answers

Answer:

a double helix structure

Explanation:

a two-stranded molecule that appears twisted, giving it a unique shape referred to most commonly as the double helix structure

Which type of plate boundary is associated with seafloor spreading at the source of the spread: convergent, divergent, or transform?
HURRY!

Answers

the answer is divergent

Can someone answer this asap!! All I know is 188g is incorrect!

Answers

Answer:

db gb bg    

Explanation:

Which has more mass, one mole of carbon (C) or one mole of copper (Cu)?
Explain.

Answers

Carbon — pay attention to your periodic table trends

How many particles are in 3.4 moles of HCl?

Answers

Answer:

The volume is 77 L.

Explanation:

where P is pressure, V is volume, n is moles, R is the gas constant, and T is temperature in Kelvins.

The current STP temperature is 0∘C or 273.15 K (used for gas laws), and the pressure is 105Pa, which most people write as 100 kPa (both pressures are equal).

what is the most important part of an Atom? Why?

Answers

Answer:

I would say proton and electron are the two most important subatomic particles in an atom

Explanation:

The number of protons inside a nucleus must equal to the number of electrons outside of the nucleus. This number determines all the chemical properties of the atom, which governs the behaviors of all matters in our world.

Answer:

I would say proton and electron are the two most important subatomic particles in an atom. The number of protons inside a nucleus must equal to the number of electrons outside of the nucleus. This number determines all the chemical properties of the atom, which governs the behaviors of all matters in our world.

Explanation:

Write a balanced symbol equation for the incomplete combustion of hexane (C6H14) to produce soot.

Answers

Answer:

I77

Explanation:

What volume of a 3.00M KL stock solution would you use to make 0.300 L of a 1.25M Kl solution?

Answers

Answer:

0.125L or 125 mL

Explanation:

See the image for steps!

0.125L of 3.00M KI stock solution is required to make 0.300 L of a 1.25M KI solution.

What is solution?

A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.

What is stock solution?

A stock solution is a concentrated solution that will be diluted to a solution of lower concentration.

stock solution = diluted solution

What do you mean by dilution?Dilution is the process of decreasing the concentration of a stock solution by adding more solvent to the solution. The solvent added is the water. The more the solvent you add, the more dilute the solution is.The equation for dilution is  M1V1=M2V2

Where, M1 = concentration in molarity (moles/Litres) of the   concentrated solution

V2 = volume of the concentrated solution,

M2 = concentration in molarity of the dilute solution

V2 = volume of the dilute solution.                                

The volume of 3.00M KI solution can be calculated using the dilution equation:

Given:

M1 = 3.00M, M2 = 1.25M, V1 = x, V2 = 0.300L

M1V1 = M2V2

3.00M(x) = 1.25M(0.300L)

           x = 0.125L

Hence, 0.125L of 3.00M KI stock solution is required to make 0.300 L of a 1.25M KI solution.

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