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lora16 [44]
3 years ago
15

Emily learns that ancient astronomers, such as Ptolemy, created a model of the solar system based only on what they could see wi

th their eyes. Describe Ptolemy's model of the solar system and how he came to his conclusions. Then describe Galileo's model of the solar system. Explain how Galileo proved that his model was correct and that Ptolemy’s was not correct.
Chemistry
1 answer:
sergey [27]3 years ago
7 0

Explanation:

Galileo found Venus went through the entire phase cycle, proving that she revolved completely around the Sun, as predicted by Copernicus in his heliocentric model. ... The phases of Venus could not be explained by Ptolemy's Geocentric Model. Galileo knew that the Roman Catholic Church was incorrect.

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3 0
3 years ago
1. 90.0 mL of distilled water is added to a 10.0mL sample of 0.150mol/L sodium
aniked [119]

Answer: dilute

Explanation:

A concentrated solution which is used to prepare solutions of lower concentrations by diluting it with addition of water.

A dilute solution is one which contains lower concentration.

Using Molarity equation:

M_1 =concentration of stock solution = 0.150 mol/L

V_1 = volume of stock solution = 10.0 ml

M_2 = concentration of dilute solution = ?

V_2 = volume of dilute solution = (10.0+90.0) ml = 100.0 ml

0.150\times 10.0=M_2\times 100.0

M_2=0.015mol/L

As the concentration is less than the original concentration, the solution is termed as dilute.

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