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Alina [70]
3 years ago
8

The planetary model of the solar system has changed over time. Under Aristotle's geocentric model, the sun, stars and planets re

volved around the Earth. Later, Copernicus' heliocentric model explained that planets revolved around the sun. Why did the planetary model change over time?
The planetary model changed because influential scientists proposed newer, more effective models.
The model changed to match the findings when new technologies allowed the gathering of new evidence.
New planetary models were created because the scientific community requires that models change periodically.
Scientific evidence was ignored until political leaders allowed the information to be used in a scientific model.
Chemistry
1 answer:
Ainat [17]3 years ago
7 0
The model changed to match the findings as new technology allowed. This is the correct answer.
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Hybridization _____.
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The answer is number two here is an explanation of why I said number two ....

In chemistry, orbital hybridisation is the concept of mixing atomic orbitals into new hybrid orbitals suitable for the pairing of electrons to form chemical bonds in valence bond theory.
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4 years ago
How does a producer get energy
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The flow of energy starts with the sun. Like plants can make their energy through the sunlight from the sun. And they create food from the process of photosynthesis.
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3 years ago
Read 2 more answers
What is the empirical formula?
algol [13]

Question

What is the empirical formula?

Answer:

Hi, There!

  • ,the empirical formula of a chemical is a simple expression of the relative number of each type of atom (called a chemical element)
  • Empirical formula is defined as the formula of a compound which gives the simple whole number ratio of the atoms of various elements present in one molecule of compound.

Hope this Helps!

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5 0
3 years ago
Is there a way to tell whether or not to put two double bonds or not. For example SeS2 seems to work if it has two double bonds
Nina [5.8K]
Your first step should be to analyse the compound. For example, if the compound is carbon, you know it always has a valence of four, so, if it has a formula C2H4 (ethylene) it obviously has a double bond. There are difficulties here because benzene C6H6 can be considered to have 6 1.5 C-C bonds, being aromatic.

A second step is to look at its structure. Double bonds are traditionally shorter than single bonds; triple bonds shorter still. Covalent bonds do have typical lengths, nevertheless you can still have problems.

<span>A third step is to consider reactivity. For example, if you have a C=C double bond, you can add, say, bromine to it Thus C2H4 gives C2H4Br2, and by adding two bromine atoms you know you have one double bond. Again, benzene becomes an awkward molecule, but because of this, you know benzene does not have double bonds in the traditional sense</span>
8 0
3 years ago
6.0 L of gas in a piston at a pressure of 1.0 atm are compressed until the volume
alex41 [277]

Answer:

1.71atm

Explanation:

The following were obtained from the question:

V1 (initial volume) = 6L

P1 (initial pressure) = 1atm

V2 (final volume) = 3.5L

P2 (final pressure) =?

Using the Boyle's law equation:

P1V1 = P2V2, the final pressure can be obtained as follow:

P1V1 = P2V2

1 x 6 = P2 x 3.5

Divide both side by 3.5

P2 = 6/3.5

P2 = 1.71atm

The final i.e the new pressure inside the piston is 1.71atm

6 0
3 years ago
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