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Sergio [31]
3 years ago
5

Explain how heat moves from one end of a metal rod to the other. (use terms small particles/ atoms, collide, transfer of energy,

high/low temperature region to elaborate) /2 ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Do you think the drawing pins may fall? Give a scientific reason to support your answer. /2
________________________________________________________________________________________________________________________________________________________

Chemistry
1 answer:
lisabon 2012 [21]3 years ago
3 0

Answer:

I only know number one answer hope it is helpful

Conduction is the transfer of heat through stationary matter by physical contact. (The matter is stationary on a macroscopic scale—we know there is thermal motion of the atoms and molecules at any temperature above absolute zero.) Heat transferred from an electric stove to the bottom of a pot is an example of conduction.

Some materials conduct thermal energy faster than others. For example, the pillow in your room may the same temperature as the metal doorknob, but the doorknob feels cooler to the touch. In general, good conductors of electricity (metals like copper, aluminum, gold, and silver) are also good heat conductors, whereas insulators of electricity (wood, plastic, and rubber) are poor heat conductors.

You might be interested in
What mass of Sodium Chloride is required to make 100.0 mL of 3.0 M solution?
Julli [10]

Answer:

17.55 g of NaCl

Explanation:

The following data were obtained from the question:

Molarity = 3 M

Volume = 100.0 mL

Mass of NaCl =..?

Next, we shall convert 100.0 mL to L. This can be obtained as follow:

1000 mL = 1 L

Therefore,

100 mL = 100/1000

100 mL = 0.1 L

Therefore, 100 mL is equivalent to 0.1 L.

Next, we shall determine the number of mole NaCl in the solution. This can be obtained as follow:

Molarity = 3 M

Volume = 0.1 L

Mole of NaCl =?

Molarity = mole /Volume

3 = mole of NaCl /0.1

Cross multiply

Mole of NaCl = 3 × 0.1

Mole of NaCl = 0.3 mole

Finally, we determine the mass of NaCl required to prepare the solution as follow:

Mole of NaCl = 0.3 mole

Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol

Mass of NaCl =?

Mole = mass /Molar mass

0.3 = mass of NaCl /58.5

Cross multiply

Mass of NaCl = 0.3 × 58.5

Mass of NaCl = 17.55 g

Therefore, 17.55 g of NaCl is needed to prepare the solution.

5 0
3 years ago
Consider the reaction hc2h3o2(aq) h2o(l) → h3o (aq) c2h3o2–(aq). Which species is the conjugate acid?a. C2h3o2-(aq)b. H2o(l)c. H
saul85 [17]

The species that is the conjugate acid is HC₂H₃O₂(aq). The correct option is d.

<h3>What are conjugate acid?</h3>

Conjugates acids are those acids which are made when an acid donates a proton to a base according to Bronsted Lowry theory.

In other words, we can say that it is an acid with hydrogen ion. An example is  water (base) reacting with an acid to form the hydronium ion (conjugate acid).

Thus, the correct option is d, HC₂H₃O₂(aq).

Learn more about conjugate acid

brainly.com/question/12883745

#SPJ4

3 0
1 year ago
What is density? How do you find it?
Assoli18 [71]

Density is the measure of a mass per unit volume of a material substance

density= Mass/volume

The unit of density is g/cm^3

5 0
2 years ago
Specific Heat Practice
Alexxx [7]

Answer:

See below

Explanation:

<u>Specific Heat of water</u> =  4.186 J/(g-C)

J/(g-C)     multiplied  by  g   and C   results in J

4.186  * 540  * (95-32) = <u>142 407 .72 J</u>

3 0
2 years ago
What is the rapid movement of excess charge known as​
EastWind [94]

Answer:

The rapid movement of excess charge from one place to another is an <em>electric discharge.</em>

Explanation:

A material in which electrons <em>CANNOT</em> move easily from place to place is an insulator. A material in which electrons <em>CAN </em>move easily from place to place is a conductor.

3 0
3 years ago
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