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Zinaida [17]
4 years ago
14

Which elements are found in the lithosphere

Chemistry
1 answer:
Black_prince [1.1K]4 years ago
4 0
Oxygen, silicon, calcium, sodium, magnesium, aluminum, potassium, and iron. 
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Which 20.0 g sample of metal is most likely to undergo the smallest change in temperature upon absorption of 100.0 J of heat?
lina2011 [118]

Answer:

b. aluminum

Explanation:

The specific heat capacity is defined as the amount of heat required to raise the temperature of 1g of a material in 1°C.

Thus, the sample with the higher specific heat capacity is the sample that will require more energy to increase its temperature in 1°C, suffering the smallest change in temperature.

Thus, is the aluminium with 0.900J/gK the element that is most likely to undergo the smallest change in temperature:

<h3>b. aluminum </h3>

5 0
3 years ago
21. A piece of metal with a a mass of 15.2 g is heated from 17°C to 42°C. In the process it absorbs 1362 J of
Sholpan [36]

Answer:

3.58J/g°C is the specific heat of the metal

Explanation:

The specific heat of a material is defined as the energy that 1g of the material absorbs and produce the increasing in temperature in 1°C. The equation is:

Q = S*ΔT*m

<em>Where Q is energy = 1362J</em>

<em>S is specific heat of the material</em>

<em>ΔT is change in temperature = 42°C - 17°C = 25°C</em>

<em>And m is the mass of the material = 15.2g</em>

Replacing:

S = Q / ΔT*m

S = 1362J / 25°C*15.2g

<h3>3.58J/g°C is the specific heat of the metal</h3>
4 0
3 years ago
Will someone please help me with numbers 22-26? I would really appreciate it. Thank you.
Naddika [18.5K]
Do You Mean 22 - 26 = 4
5 0
4 years ago
In a given chemical reaction, the energy of the products is less than the energy of the reactants. Which statement is true for t
HACTEHA [7]

Answer:

Energy is released in this reaction possibly in the form of heat thus it is an exergonic and or exothermic reaction.

The energy is sometimes transferred as heat, inflicting the reaction mixture and its surroundings to become hotter. The temperature increase may be detected employing a measuring device. Some samples of exothermic reactions are: Combustion .An chemical reaction may be a chemical process that releases energy by lightweight or heat.

Explanation:

6 0
3 years ago
Read 2 more answers
2KClO3 —&gt; 2KCl2+ 3O2
garik1379 [7]

Answer:

False. The balanced equation should be

2KClO3-->2KCl + 3O2

it is a decomposition reaction.

3 0
3 years ago
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