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Charra [1.4K]
3 years ago
9

On Monday while Johnny was getting ready for school, he was in the bathroom holding his comb when he got an itch on his head. Jo

hnny used the comb to rub his itch away and when he did his hair was a mess. He turned on the faucet so there was a small stream of water flowing and as he brought the comb near the water to dampen it, he noticed that the water was pulling towards the comb. Thinking he was seeing things, he pulled the comb back and the water was flowing straight down. He again moved the comb near the stream of water and the water again was pulling towards the comb. He repeated this process many times and the water continued to move towards the comb when the comb was near the water. What do you think is happening to the stream of water flowing from the faucet? Support you claim in Question 1, by explaining why you think it is happening. Formulate your hypothesis for the problem.
Chemistry
2 answers:
Shtirlitz [24]3 years ago
6 0

Answer:

Check Explanation.

Explanation:

This phenomenon is due to static electricity.

When one body is rubbed against another, the surface charges on one are transferred to the other.

So, rubbing the hair with comb rubs off electrons from the surface of the comb onto the hair. Thereby making the overall charges on the comb more positive than negative. (Since every object normally has an equal amount of positive & negative charges and rubbing a particular amount of negative charges off the comb, makes the comb overall positively charged).

Now, the structure of a water molecule has two hydrogen atoms and an oxygen atom. The hydrogen atoms attach to two out of the six valence electrons of each Oxygen atom; leaving 4 electrons to pair off into 2 pairs that are 2 lone pairs. So, basically, each water molecule has two lone pairs of electrons.

So, it seems natural according to the teachings of static electricity that water molecules with 2 lone pairs of electrons, are attracted to a relatively positively charged comb. Hence, the water molecules naturally attract towards the positively charged comb. (Like charges repel, unlike charges attract).

Hope this Helps!!!

balandron [24]3 years ago
5 0
I'd say that his comb has a static electricity charge. It can either be negative, or positive. Let's just say it's positive, and the water is negatively charged. This means that it will affect the water flow when the two charges meet. I hope this helps! ~Mia
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In-s [12.5K]

Answer:

Sorry

Explanation:

Sorry this is not chemistry but I always try to answer but this time I can't I am so so sorry

4 0
3 years ago
Read 2 more answers
For the reaction shown, identify the element oxidized, the element reduced, the oxidizing agent, and the reducing agent. KNO3 →
Vinvika [58]

Answer : The oxidizing element is N and reducing element is O. 

KNO_{3} is act as an oxidizing agent as well as reducing agent.

Explanation :

An Oxidizing agent is the agent which has ability to oxidize other or a higher in oxidation number.

Reducing agent is the agent which has ability to reduce other or lower in oxidation number.

The given reaction is :

KNO_{3} \rightarrow KNO_{2} +O_{2}

KNO_{3}  act as an oxidizing agent.

The oxidation number of N in KNO_{3} is calculated as:

(+1)+(x)+3(-2) = 0

x = +5

And the oxidation number of N in KNO_{2}  is calculated as:

(+1)+(x)+2(-2) = 0

x = +3

From the oxidation number method, we conclude that the oxidation number  reduced this means KNO_{3} itself get reduced to KNO_{2} and it can act as an oxidizing agent.

KNO_{3}  act as a reducing agent.

KNO_{3} \rightarrow KNO_{2} +O_{2}

The oxidation number of O in KNO_{3} is calculated as:

(+1)+(+5)+3(x) = 0

x = -2

The oxidation number of O in O_{2} is Zero (o).

Now, we conclude that the oxidation number increases this means KNO_{3} itself get oxidized to O_{2} and it can act as reducing agent.





                     

4 0
3 years ago
Read 2 more answers
Which of the statements about elements is true?
Jet001 [13]

1. No two elements have the same kind of atom.

Explanation:

The correct of all statement is that no two elements have the same kind of atoms.

Every element have different atoms.

  • Over a hundred elements have been identified by scientists.
  • Atoms are the smallest particles that takes part in chemical reactions.
  • Elements are distinct substances that cannot be split.
  • Atoms of all elements do not have the same mass and volume. Isotopes are examples.
  • It is true that atoms of all elements have different masses and also different volumes.
  • The volume of an atom is function of the number of electrons it contains.

learn more:

Dalton model of the atom brainly.com/question/1979129

#learnwithBrainly

3 0
3 years ago
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In an aqueous solution at 25°C, if [H30+] = 3.3 * 10^4 M, then [OH-] is:
sleet_krkn [62]

Answer:

[OH-] = 3.0 x 10^-19 M

Explanation:

[H3O+][OH-] = Kw

Kw = 1.0 x 10^-14

[H3O+][OH-] = 1.0 x 10^-14

[OH-] = 1.0 x 10^-14 / 3.3 x 10^4 = 3.0 x 10^-19

3 0
3 years ago
Which description accurately represents a water molecule
inna [77]

Answer:

The water molecule is comprised of two hydrogen (H) atoms and one oxygen atom,  oxygen atom has 8 electrons, and each H has 1 electron. The H atoms bond to the oxygen by sharing a pair of electrons in what is called a covalent bond. In each pair of shared electrons, one electron is contributed by the H (black) and one from the oxygen (red).

Explanation:

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4 0
2 years ago
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