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Anika [276]
2 years ago
13

In 3–5 sentences, explain why electrical wires are often constructed from metal coated with rubber, and how that is similar to m

etal pans having rubber or plastic handles.(4 points)
Chemistry
1 answer:
stich3 [128]2 years ago
7 0

Answer:

Covering electrical wires in plastic guarantees that the electrons flowing through the wires will not flow through your body when the wire is touched.

Explanation:

"The purpose of insulation covering the metal part of an electrical wire is to prevent accidental contact with other conductors of electricity, which might result in an unintentional electric current through those other conductors."

https://www.allaboutcircuits.com/worksheets/wire-types-and-sizes/#:~:text=Most%20electrical%20wire%20is%20covered,or%20plastic%20coating%20called%20insulation.&text=The%20purpose%20of%20insulation%20covering,current%20through%20those%20other%20conductors.

https://www.hunker.com/13414152/why-are-electrical-wires-covered-in-plastic

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I get 2 marks for this so plz answer. How many particles are in a 53.2 L volume of gas at STP?
exis [7]

The number of particles= 1.43 x 10²⁴ particles

<h3>Further explanation</h3>

Given

53.2 L volume of gas at STP

Required

The number of particles

Solution

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters/mol.

So mol for 53.2 L :

= 53.2/22.4

= 2.375 moles

1 mol = 6.02 x 10²³ particles (molecules, atoms, ions)

The number of paricles for  2.375 moles gas :

= 2.375 x 6.02 x 10²³

= 1.43 x 10²⁴ particles

6 0
3 years ago
✯Hello✯☆(❁‿❁)☆
sveticcg [70]

do you mean fractional distillation of crude oil ?

if you do then this is what happens:

basically, crude oil is made up of a lot of hydrocarbons so it's put into a fracitonating column to separate these compounds into fractions. the top of the fractionating column is colder whereas the bottom of the column is hotter.

gases, petrol, diesel and kerosene come out near the top of the top of the column because they are shorter chains. substances near the top of the column also have a lower boiling point (since it's cooler and there's less intermolecular forces).

the substances at the top of the column are typically useful fuels because they have a higher ease of ignition (higher up=easier to ignite, lower down = harder to ignite). Also, substances at the top have a low viscosity so they can flow easily.

substances that come out near the bottom of the fracitonating column include fuel oil and bitumen.

these are longer chains of hydrocarbons and bitumen is used for road surfacing.

these substances have a high viscosity (harder to flow) and have a high boiling point since they have more intermolecular forces which require a lot of energy to break. Also the bottom of the fractionating column is warmer and this is where these fractions are released.

5 0
3 years ago
A graduated cylinder contains 15.0 mL of water. When a metal solid is added to the cylinder the water level rises to 35.5 mL. Th
vova2212 [387]
There answer is 6.63 g/mL.
4 0
2 years ago
What is the mass of 1.50 mole of (NH4)2CO3?
Scilla [17]

Answer:

144.12873

Explanation:

Hope this helps you

-----------------------------------------------------------------------------------------------------------------

回答:

144.12873

説明:

これがお役に立てば幸いです

4 0
3 years ago
Read 2 more answers
The solubility of potassium chloride in boiling water is 56.3 g/100 g water. if you add 250.0 g of potassium chloride to 50.0 g
11111nata11111 [884]
The solubility of KCl in boiling water is 56.3 g / 100 g water So each gram of water dissolve 56.3 / 100 = 0.563 g KCl in g water

We have here 50 g water so the total amount of KCl dissolved = 50 * 0.563 = 28.15 g KCl 

We have 250 g KCl so it is not dissolved completely (only 28.15 g KCl will be dissolved) 
7 0
3 years ago
Read 2 more answers
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