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juin [17]
3 years ago
7

4) In the experiment, why do you think they started with water that was the same temp (118 °F) for each

Chemistry
1 answer:
kondor19780726 [428]3 years ago
3 0

Answer:

4. I think that they started with water that was the same tsmpurature because if they didnt start with the same temp of water then it would be harder to tell which one was better. and could hold the most heat.

5. yes i think it would matter, because if you have more water in one cup it might stay warmer than it would with the cups with less water, and if it was thicker it would hold mor heat because it is not so thin that the heat is just gonna come out it has to come through more for the heat to get out.

Explanation:

sorry if these are to long but thats how i would answer them.

hope it helped

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Red lights on a traffic light have a frequency of 4.3 X 10^15 Hz. What is the red light’s wavelength in meters? (Speed of light
Juliette [100K]

Answer:

The correct answer to this problem is B. 7.0 X 10^-8 meters

Explanation:

To solve this problem, we have to use the following equation:

c = λν, or speed of light = wavelength*frequency

If we substitute in the values we are given by the problem, we get:

3.00 * 10^8 m/s = (4.3 * 10^15 Hz)*(wavelength)

wavelength = 6.98 * 10^-8 m

Since the given value has 2 significant figures, our answer should similarly include two significant figures since the operation in the problem was multiplication.

Therefore, the answer is B. 7.0 X 10^-8 meters.

Hope this helps!

6 0
2 years ago
Fundamental differences in the cell, the basic unit of life, allow for broadest classification of all living organisms into thre
Nana76 [90]

Answer:

C

Explanation:

7 0
3 years ago
Lighting a match is an example of what kind of energy conversion?
Alika [10]

Answer:

Mechanical Energy to Thermal Energy

When you strike a match, it moves through the air until it rubs against a surface. The rubbing produces the heat required to light the match. This is a transformation from mechanical energy to thermal (heat) energy.

Explanation:

4 0
2 years ago
Read 2 more answers
You have an atom represented by X (not real by the way). X has 2 valence electrons. You have another atom Y that has 5 valence e
BabaBlast [244]

The chemical formula : X₃Y₂

<h3>Further explanation  </h3>

The noble gas element is a stable class of elements. The noble gas element is monatomic. Stability of noble gases is caused by an electron configuration that has a stable configuration of 8 (has 8 valence electrons) except He with a duplet configuration (has 2 valence electrons)

Other elements that do not yet have electron configurations such as noble gases will try to achieve their stability by forming bonds between elements.

This is generally called the octet rule

X has 2 valence electrons.to achieve stability, element X will release 2 electrons to form X²⁺

Y has 5 valence electrons, to achieve stability, the element Y will attract/ add electrons to form Y³⁻

The two compounds will form a compound with the charges crossed : X₃Y₂

6 0
3 years ago
In Ontario, some electricity comes from coal-burning generators. Coal is a natural form of carbon that has a large amount of sul
irinina [24]

Answer:

a)

C(s)+O_{2}(g) \rightarrow CO_{2}(g)

S(s)+O_{2}(g) \rightarrow SO_{2}(g)

b)

Sulphurdioxide

c)

SO_{2}(g) + H_{2}O(l) \rightarrow H_{2}SO_{3}(l)

SO_{2}(g) + \frac{1}{2}O_{2} \rightarrow SO_{3}(g)

d)  

Incomplete combustion produce harmful gases.

Explanation:

a)

Carbon reacts with atmospheric oxygen to form carbondioxide as well as sulphur dioxide.

The chemical equations are as follows.

C(s)+O_{2}(g) \rightarrow CO_{2}(g)

S(s)+O_{2}(g) \rightarrow SO_{2}(g)

b)

Sulfur dioxide is very harmful to the environment to cause acid rains.

This harmful gas mix with rain water to form  sulphuric acid.

c)

The balanced chemical equation for the reaction that produces harmful environmental effects is as follows.

SO_{2}(g) + H_{2}O(l) \rightarrow H_{2}SO_{3}(l)

SO_{2}(g) + \frac{1}{2}O_{2} \rightarrow SO_{3}(g)

SO_{3}(g) +H_{2}O(l) \rightarrow H_{2}SO_{4}(l)

d)

In the absence of proper amount of oxygen required for combustion, incomplete combustion will take place which will result in formation of more carbondioxide an other harmful gases.

4 0
3 years ago
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