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givi [52]
3 years ago
14

Which properties change the composition of a substance?

Chemistry
1 answer:
Elanso [62]3 years ago
4 0

Answer:

A.

Explanation:

Physical properties are characteristics of a substance that can be observed or measured without changing the composition of the substance. Some examples of physical properties are its volume and its density. There are two types of physical properties, intensive physical properties and extensive physical properties.

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The following reaction has been reported in the chemical literature and gives a single organic product in high yield. Write the
Alla [95]

Answer:

Explanation:

The principle applied is the Markovnikoff's rule which states that when hydrogen chloride adds to a double bond, the hydrogen atoms join to the carbon that already has the most hydrogen atoms bonded to it. The rule wa postulated by a russian chemist known as Vladimir Markovnikoff.

In the markovnikoff's rule, there are sveral conditions that must be met, one of them is that no free radicals must be involved.

The reaction and the structure of the product is as shown in the attachment.

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3 years ago
Why does it take so much heat and pressure to create helium and other elements?
ehidna [41]

Answer:

To break down the nucleus of an atom

Explanation:

Remember to change from one element to another, is necessary to add protons, neutrons and electrons,in most of the cases.

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In this way, is a must to have a combination of pressure and heat to destabilize an atom and take some of this subatomic particles.

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3 years ago
Which mixture can be separated based on differences in particle size of the components?
Aleksandr [31]
Heterogenous mixtures can separates due to differences in size of components
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3 years ago
Which metal is most likely to form more than one kind of positively charged ion? sodium (Na) barium (Ba) nickel (Ni) magnesium (
Naya [18.7K]
Nickel most likely will, it's a transition metal
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3 years ago
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An atom of which of these elements most likely forms an anion? A. AI B. Br C. Ca D. Mg
Papessa [141]
The answer is B. A good way determine this is how far right the element is on the periodic table. The further right the element is, the more electronegative it is meaning it is more willing to accept an electron. This can be explained using the valence electrons and how many need to be added or removed to complete the octet. The further right you are, the easier it is for the element to just gain a few electrons instead of loose a bunch. Noble gases are the exception to this since they don't normally react though.
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3 years ago
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