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OverLord2011 [107]
3 years ago
10

Who proposed a heliocentric model of the solar system

Chemistry
2 answers:
Mandarinka [93]3 years ago
7 0
Nicolaus copernicus !
alekssr [168]3 years ago
4 0
<span>This theory was first proposed by Nicolaus Copernicus. hope it helps</span>
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Name two "Storage Polysaccharides" and two "Structural Polysaccharides"
Vsevolod [243]

Answer:

Examples of storage polysaccharides - <u>starch and glycogen</u> and structural polysaccharides - <u>cellulose and chitin</u>

Explanation:

Polysaccharides are the complex carbohydrate polymers, composed of monosaccharide units that are joined together by glycosidic bond.

In other words, polysaccharides are the carbohydrate molecules that give monosaccharides or oligosaccharides on hydrolysis.

The examples of storage polysaccharides are starch and glycogen. The examples of structural polysaccharides are cellulose and chitin.

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3 years ago
Calculate the frequency of light having wavelength of 456 nm.
Lubov Fominskaja [6]

Answer:

Calculate the frequency of light having wavelength of 456 nm.

1.22*10^8nm

Explanation:

7 0
2 years ago
How to we know how many neutrons are in the atoms we draw models for ? (We represent average atoms, not ions or isotopes)
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Answer:

Atoms is the smallest unit of a chemical element and consist of three main components protons, neutrons, and electrons.

The number of a neutron is based on the difference between the mass number of the atom (M) and the atomic number (Z). every isotope of an element has a different number of neutron.

But in a neutral atom or average atom, the number of neutrons is equal to the number of protons and the number of electron.

Example of the number of neutrons in an average atom: In Nitrogen-14, the atomic number and the number of protons is 7, it means the number of neutrons will also 7.

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3 years ago
Butane boiling point
Natasha_Volkova [10]
<span>Butane boiling point is -1C</span>
7 0
3 years ago
Read 2 more answers
During an experiment, Jasmine observes light being produced from mixing 2 substances in a beaker. What does this evidence sugges
Lubov Fominskaja [6]

Answer: C. A Chemical Change

Explanation:

A chemical change is one that occurs when new substances are produced preceding a chemical reaction ( the  mixing  or combination of one substance  with another).

From the experiment by Jasmine, since light was produced from the mixture,  energy is being released which is due to a  chemical change.

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3 years ago
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