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Darya [45]
3 years ago
12

What is true about the atoms at the start of a chemical reaction compared to the atoms at the end of the reaction

Chemistry
1 answer:
yan [13]3 years ago
5 0

there is always the same number of atoms at start and end, no atoms 'disappear' and none are 'made'
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Choose all the answers that apply.
Tresset [83]
<h3>Answer:</h3>

#a.2H2 + O2 → 2H2O

#b. 2S + 3O2 → 2SO3

#d. 2K + 2H2O → H2 + 2KOH

<h3>Explanation:</h3>
  • A balanced chemical equation is one that has equal number of atoms of each element on both sides of the equation.

In this case;

  • 2H2 + O2 → 2H2O - is balanced since it has, 4 hydrogen atoms and 2 oxygen atoms on either sides of the equation.
  • 2S + 3O2 → 2SO3, is balanced. It has 2 sulfur atoms and 6 oxygen atoms on both side of the equation.
  • 2K + 2H2O → H2 + 2KOH, is balanced , 2 potassium atoms, 4 hydrogen atoms and 2 oxygen atoms on both side of the equation.
  • On the other hand, the equations that are not balanced include;
  1. Li + Cl2 → LiCl
  2. 2Fe + Cu(NO3)2 → 2Cu + Fe(NO3)2

This is because the number of atoms of each element is not equal on both side of the equation/

5 0
3 years ago
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4 examples of bases​
Vesna [10]

Answer:

Caustic Soda

Limewater

Milk of Magnesia

Bleach

Explanation:

4 0
3 years ago
Why does your reflection in a mirror look different from your reflection in wood
skad [1K]

<span>The surface of a mirror is smoothly and therefore the rays of light are reflected with the same angle they hit the surface. The surface of a piece of wood on the other hand has a lot of microscopical imperfections and hence the rays of light are reflected in multiple directions.</span>

3 0
3 years ago
Evaluate three communication skills that can assist you in sustaining positive relationships​
Tpy6a [65]

1. Accept and celebrate differences. One of the biggest challenges we experience in relationships is that we are all different. We can perceive the world in many ways. Certainly astumbling block that we come across when we try to build relationships is a desire or an expectation that people will think like we do and, in this way, it is so much easier to create a rapport. We feel more comfortable when we feel that people “get” us and can see our point of view. Life, however, would be very dull if we were all the same and, while we may find it initially easier, the novelty of sameness soon would wear off. So accepting and celebrating that we are all different is a great starting point.

2. Listen effectively. Listening is a crucial skill in boosting another person’s self-esteem, the silent form of flattery that makes people feel supported and valued. Listening and understanding what others communicate to us is the most important part of successful interaction and vice versa.

Active or reflective listening is the single most useful and important listening skill. In active listening, we also are genuinely interested in understanding what the other person is thinking, feeling, wanting, or what the message means, and we are active in checking out our understanding before we respond with our own new message. We restate or paraphrase our understanding of their message and reflect it back to the sender for verification. This verification or feedback process is what distinguishes active listening and makes it effective.

3. Give people your time. Giving time to people is also a huge gift. In a world where time is of the essence and we are trying to fit in more than one lifetime, we don’t always have the time to give to our loved ones, friends, and work colleagues. Technology has somewhat eroded our ability to build real rapport and we attempt to multi-task by texting and talking at the same time.

Being present in the time you give to people is also important, so that, when you are with someone, you are truly with someone and not dwelling in the past or worrying about the future. The connection we make with other people is the verytouchstone of our existence, and devoting time, energy, and effort to developing and building relationships is one of the most valuable life skills.

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What does weight measure?
Luda [366]
C because I’m space there’s no gravity meaning things are weightless
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4 years ago
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