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Dafna11 [192]
4 years ago
11

When you get into a car with hot black leather in the middle of the summer and it hurts your skin when you sit, this is an examp

le of? Question 5 options: convection conduction radiation
Chemistry
2 answers:
lys-0071 [83]4 years ago
6 0
This is specifically the example of Conduction as Heat flows from leather to your skin !!
Gennadij [26K]4 years ago
5 0

Heat can be transferred from one object to another in 3 different ways.

1) Conduction : This is the mode of transfer of heat through solid medium.

Example : A metal rod getting hot when hold over a flame.

2) Convection : This is the mode of transfer of heat through liquids

Example : Boiling of water.

3) Radiation : This type of heat transfer does not require any medium.

Example : When we stand close to a campfire, we feel warmer. Here the heat travels through air.

In the given problem, when a person gets into a car with hot black leather, his skin comes in contact with the hot object. Here the heat gets transferred through the skin which is a solid medium.

Therefore this is an example of conduction.

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If 85.0 grams of ethanol reacts, how many grams of carbon dioxide are produced?
Alenkinab [10]

Answer:

162.4g of CO2 are produced

Explanation:

The combustion of ethanol, C2H5OH, occurs as follows:

2C2H5OH + 7O2 → 4CO2 + 6H2O

<em>Where 2 moles of C2H5OH produce 4 moles of CO2.</em>

<em />

To solve this question we need to convert the mass of ethanol to moles. Then, the moles of ethanol to moles of CO2 using the balanced reaction and to mass:

<em>Moles C2H5OH -Molar mass: 46.07g/mol-</em>

85.0g * (1mol / 46.07g) = 1.845 moles C2H5OH

<em>Moles CO2:</em>

1.845 moles C2H5OH * (4mol CO2 / 2mol C2H5OH) = 3.69 moles CO2

<em>Mass CO2-Molar mass: 44.01g/mol-:</em>

3.69 moles CO2 * (44.01g/mol) =

<h3>162.4g of CO2 are produced</h3>
6 0
3 years ago
The measure of the attraction that an atom has for electrons involved in chemical bonds is known as:
Mariana [72]
Electronegativity is the tendency of atom to attract shared pair of electron towards itself . Its value is out of 4 , and Fluorine is higly electronegative.
So, 
D electronegativity, is the correct answer.
7 0
3 years ago
Arrange the following compounds in order of DECREASING boiling points (going from the highest to the lowest):
Gennadij [26K]

Answer:

b

d

a

c

Explanation:

More carbons in longest chain = higher BP

D has a BP of 0.8

A has a BP -0.5

C is the lowest because the more branched it is the lower BP

6 0
3 years ago
You have probably noticed that some liquids, such as honey and molasses, flow slowly at room temperature. How does heating affec
Nadusha1986 [10]

Answer:

Viscosity of water decreases markedly with increasing temperature. When the viscosity decreases, the flow resistance decreases. So for the same driving force, that is the pressure drop per unit length, the water flow rate will be higher.

Hope this helps :)

5 0
3 years ago
Lactose is disaccharide ; which monosaccharides are present in it​
maxonik [38]

Answer:

Lactose, the disaccharide of milk, consists of galactose joined to glucose by a β-1,4-glycosidic linkage. Lactose is hydrolyzed to these monosaccharides by lactase in human beings.

8 0
3 years ago
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