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Serga [27]
3 years ago
7

Explain how a chemical reaction occurs using the following terms

Biology
2 answers:
-BARSIC- [3]3 years ago
7 0
For a chemical reaction to occur, activation energy is required. Using the activation energy, reactants form products by breaking bonds which require energy. This type of reaction is an endothermic reaction. When products are formed, bonds are formed back by releasing energy. This type of reaction is an exothermic reaction. When activation energy is used for a reaction, a catalyst is not required. Adding a catalyst to the reaction causes the rate of reaction to increase.
Taya2010 [7]3 years ago
6 0
What is activation energy? Activation energy is the minimum amount of energy needed to start a chemical reaction.
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Compare and contrast the two types of bonds
stepan [7]

Answer:

An ionic bond is formed between a metal and a non-metal. Covalent bonding is a form of chemical bonding between two non metallic atoms which is characterized by the sharing of pairs of electrons between atoms and other covalent bonds.

Explanation:

There are two types of atomic bonds - ionic bonds and covalent bonds. They differ in their structure and properties. Covalent bonds consist of pairs of electrons shared by two atoms, and bind the atoms in a fixed orientation. Relatively high energies are required to break them (50 - 200 kcal/mol). Whether two atoms can form a covalent bond depends upon their electronegativity i.e. the power of an atom in a molecule to attract electrons to itself. If two atoms differ considerably in their electronegativity - as sodium and chloride do - then one of the atoms will lose its electron to the other atom. This results in a positively charged ion (cation) and negatively charged ion (anion). The bond between these two ions is called an ionic bond.

8 0
3 years ago
A type of succession in which an ecosystem damaged by fire is reestablished
Oxana [17]
Secondary Succession<span>
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4 0
4 years ago
Receptor
77julia77 [94]

The correct answers are shorter, longer, and have inverse proportionality and are used in dental radiography.

In the first case vertical angulation is what is used to control the length of any image which is being recorded and it is dictated by the holding device which directs the beam of x-ray perpendicular to both the receptor and teeth and in this case the image which is formed is shorter then the real teeth and it also occurs if the central ray is directed perpendicular to the plane of the receptor rather than to the imaginary bisector.

In the second case, the vertical angulation is flat or if it is too small the image of the teeth will be longer than the actual teeth and it often occurs due to bisecting technique.

Distortion is any kind of change that can occur in both the shape and size of the object and this is inversely proportional to the vertical angulation as when vertical angulation is not correct it creates distortion and also the steep is angulation the smaller the image will be and flat the angulation is the larger or longer the image is and in distortion which comes due to radiograph is mainly used for the teeth and the recommended angulation is +10 degree in which the central ray is directed through the contact of the teeth.

This is also called dental radiography.

To know more about vertical angulation click at brainly.com/question/14477223

#SPJ9

3 0
1 year ago
4. Ribosomes are made up of _____.
Crazy boy [7]

Ribosomes consist of two major components: the small ribosomal subunits, which read the RNA, and the large subunits, which join amino acids to form a polypeptide chain.

You can read more about it on wikipedia. Hope I helped!! :)

8 0
3 years ago
How do systems in organisms prove that organisms are related?
AveGali [126]
They all have these traits: <span>Cellular organization, Reproduction, Metabolism, Homeostasis, Heredity, Response to stimuli, Growth and development, and <span>Adaptation through evolution.</span></span>
8 0
3 years ago
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