Provide two examples of how scientists communicate experimental results

Chemistry

2 answers:

Doss [256]2 years ago

6 0

One way is through journals. Another way is through presentations.

Len [333]2 years ago

5 0

Answer:

The correct answer will be- publish in scientific journals and presentation in conferences.

Explanation:

In the scientific method, communicating and sharing the results to the scientific community is an important step of the method.

This step allows the scientific community to check and verify the results which ensured the quality of the scientific research as well as prevent from the fraud. Communicating the results also allows for the argumentation over the issue which is also considered important.

To communicate the results, scientists have to either publish the results in approved scientific journals or present their work in a scientific conference through poster or power-point presentations.

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Why does magnesium oxide have a high melting point?

Mandarinka [93]

Magnesium oxide is an ionic compound ( because it consists of a metal and a non-metal)

In ionic compounds, electrons from the outer shell exchange between the atoms so that they each get a full outer shell. Once these electrons are exchange, the atoms will become ions. One ion will have a positive charge, and the other ion will have a negative charge. The positive and negative ions then bond strongly together in a lattice structure, due to the electrostatic forces of attraction.

These electrostatic forces of attraction are very strong and require a lot of energy to break, as such the compound will have a high melting point.

__________________________________________

Now lets look at the ionic bonding between magnesium and oxygen:

In the outer shell of Magnesium, there are 2 electrons.

In the outer shell Oxygen, there are 6 electrons.

Magnesium gives it's two electrons to Oxygen, so that the Oxygen now has a full outer shell of 8 electrons. However, since Oxygen gained two electrons, it will form a negatively charged ion with a charge of -2.

Since Magnesium lost the two electrons, it's second shell (which has 8 eletrons) now becomes the outer shell. So Magnesium also now has a full outer shell. But since it has lost two electrons, it becomes a positively charged ion with a charge of + 2.

The positive Magnesium ion and negative Oxygen ion and now strongly attracted to each other, and form a strong ionic compound (magnesium oxide) with a lattice structure.

The electrostatic forces of attraction between the positive Magnesium and negative Oxygen are so strong that a lot of heat and energy are needed to break them.

Therefore magnesium oxide has a high melting point.

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2 years ago

Which reaction results in the GREATEST increase in entropy?

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I would say D would be the answer

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The mass number goes on top, and the atomic number goes on bottom.
Therefore, the answer is C:
40
K
19

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