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pochemuha
3 years ago
12

Compare endothermic and exothermic reactions and give examples of each. In an endothermic reaction would we expect the temperatu

re to rise or fall? Explain why.
Chemistry
1 answer:
Ivanshal [37]3 years ago
3 0

Exothermic gives off heat/energy and endothermic takes in heat/energy. Exothermic example: a candle flame

Endothermic example: baking bread

In Exothermic, you can expect the surrounding temp. to rise, and in Endothermic you can expect the surrounding temperature to fall.

Hope this helps

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What is the representative particle for an element?
xz_007 [3.2K]

Answer:

The representative particle for an element is AN ATOM.

Explanation:

Representative particle of a substance refers to the smallest unit of that substance, which can not be broken down into smaller particles. The representative particles of an element is an atom, because each element is made up of atoms, which are the smallest unit of that element; they can not be broken down further.

A representative particle is chemically identical with the parent element and will have all the properties of the parent element.  

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3 years ago
What happens if you drink juice instead of water? reddit?
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Juice can be sugary so it can add more fat to your body... I don’t know man lol
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Arrange the steps in order to describe how photons and carbon dioxide contribute to the warming of earth
adell [148]

Answer:

The steps are arranged in the following order, describing how carbon dioxide and photons  impact the earth's warming.

Explanation:

The sequence is in the following order;

  1. The sun radiated sunlight (visible) photons
  2. Photons from the sun strike the earth and become infrared photons
  3. Earth radiates infrared photons into the atmosphere
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Carbon dioxide (CO2) molecules can absorb energy from infrared (IR) radiation. Due to vibrations caused by this absorption, the CO2 molecules later release extra energy by emitting another infrared photon.

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5 0
4 years ago
PLEASE URGENT I will give MOST POINTS POSSIBLE For the following reactions, (a) write the balanced reaction equations and (b) ID
Tema [17]

Answer:

see below

Explanation:

Aqueous hydroiodic acid reacts with liquid water in a reversible reaction.

2 HI  +  2 H₂O  ⇔  2 H₃O  +  I₂

This is an acid-base reaction.  HI is the acid, and H₂O is the base.  The conjugate acid is H₃O, and the conjugate base is I₂.  You can figure out the acid and base by a using a table of strong/weak acids and bases.  The conjugate will have one less or one more H⁺ depending on if it's an acid or a base.

The expression for Kₐ of the reaction is below.  You have to put the acid and its conjugate base on the top and the base and its conjugate on the bottom.  I didn't put in H₂O since, although it is the base in this equation, it isn't really a base.

K_{a}=\frac{[HI][H_{3}O] }{[I_{2}] }

Solid zinc reacts with solid manganese (IV) oxide producing solid zinc oxide and solid manganese (III) oxide.

Zn  +  2 MnO₂  ⇒  ZnO  +  Mn₂O₃

This is a redox reaction.  The Zn is being oxidized, and the Mn is being reduced.

Oxidation:    Zn  ⇒  Zn⁺²  +  2 e⁻

Reduction:   Mn⁺⁴  +  e⁻  ⇒  Mn⁺³

Aqueous silver nitrate reacts with aqueous calcium chloride.

2 AgNO₃  +  CaCl₂  ⇒  2 AgCl  +  Ca(NO₃)₂

This is a precipitation reaction.  You have two soluble salts combing to form a solution.  You now need to figure out which of the compounds produced are not soluble.  AgCl is the compound that is not soluble in water, making it the precipitate.

I think I covered everything.  If I missed something let me know.

8 0
3 years ago
If a cell were compared to a school, which part of the school would represent the cell's nucleus?
bazaltina [42]

Answer:

C-The principal because he or she controls all the activity in the school

4 0
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