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Naddik [55]
3 years ago
14

Which of the following is a part of the heliocentric model? All objects in space move around Earth in perfect circles. All objec

ts in space move around the sun. All objects in space move in parallel tracks. All objects in space are perfect spheres.
Chemistry
2 answers:
Viefleur [7K]3 years ago
5 0
The Heliocentric system is a model whereby the sun is assumed to be in the middle of the solar system and all the other objects including the Earth move or revolve around it.This method opposed the earlier model of Geocentrism which proposed that the Earth was lying at the centre and all the other objects revolved around it.
pentagon [3]3 years ago
5 0

Answer:

B is the answer your looking for

hope it helps :)

Explanation:

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An acetylide anion is more stable than either a vinylic or alkyl anion due to Group of answer choices the greater stability of a
sashaice [31]

Answer:

the stabilization of the negative charge in orbitals with higher s character

Explanation:

Acetylide anion is a carbon anion compound or popularly called carbanion. Now Acetylide anion is sp hybridized. However acetylide anion tends to be more acidic as we move from sp³ to sp, hence acidicity increases, which makes sp to have the highest acidity and become the most  stable.

So, we can conclude that the acetylide anion is more acidic due to the stabilization of the negative charge in orbitals with higher s character and  as the s character increases, acidic nature of acetylide anion also increases.

5 0
3 years ago
Design an experiment to collect data that supports the claim that a 1.0M NaCl solution is a homogenous mixture.
Alika [10]
The claim is that NaCl mixture is a homogeneous mixture.
Homogeneous mixture means that the components of the mixtures cannot be determined or separated by the naked eye. However, these components can be separated using physical means, such as boiling, evaporation and condensation which will be used in this experiment.

First, we need to prepare one molar solution of NaCl. To do so, we will dilute a mass of 58.44 grams (molar mass of NaCl) in 1 liter of water.
By this, we will have NaCl solution.

We can notice that once the NaCl is diluted in water, all what you can see is a clear solution. You cannot see the separate particles of NaCl in water.
..............> observation I

Now, we will heat this solution until it boils and water starts evaporating. We will place a cold surface above the steam coming out from the boiling solution.

What we will observe is that when all the water evaporates, we can see white precipitate of NaCl in the bottom of the container. Examining the cold surface placed above the steam, we can see that the water has condensed on this surface.
.........>observation II

Based on this, we managed to use boiling, evaporation and condensation (physical methods) to restore the components of the solution separately.
.............>conclusion

Based on observation I, observation II and the conclusion. we were able to prove that NaCl solution is a homogeneous mixture.
7 0
4 years ago
An acid
tekilochka [14]
The answer is A. Has a low pH in solution.
5 0
3 years ago
What information can be learned from bloodstains at a crime scene?
tangare [24]

you can learn who's blood it is, you can also see the blood patterns and how the crime maybe happened.

3 0
3 years ago
What would happen if a hot piece of iron were placed in a bucket of water at room temperature? How do you know?
BaLLatris [955]

Answer: Eventually, the metal will cool down and warm up. Overtime the metal and the water will come to the same temperature. This happens because the hot metal is giving energy to the water.

Explanation:This process is called thermal equilibrium. It's the same thing as when you put a spoon in hot tea the spoon gets hot and the tea cools down. Hope this helps!!

8 0
3 years ago
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