Which of the following uses a nonrenewable energy resource to generate energy? A. nuclear power plant B. wind farm C. fireplace that burns wood D. biomass power plant

Answer:

it has 3 valence electrons

Explanation:

2+2+1 is 5, boron is 5 and its in the 3rd group

Answer:

J.J. Thomson

Explanation:

Answer:

D

Explanation:

took the test

Final answer:

The Lewis dot structure for Mg3N2 represents the ionic bonding between magnesium and nitrogen. Each magnesium atom donates its 2 valence electrons to nitrogen, as represented by zero dots around each Mg and eight around each N.

Explanation:

The student is asking about the Lewis dot structure of Mg3N2, which is commonly known as magnesium nitride. The Lewis dot structure is a graphical representation of the molecule that shows how the electrons are arranged among the atoms of the molecule.

To draw the Lewis dot structure for magnesium nitride, follow these steps:

1. Magnesium (Mg) has 2 valence electrons, and there are 3 Mg atoms, so in total there are 6 valence electrons from Mg.
2. Nitrogen (N) has 5 valence electrons, and there are 2 N atoms, so in total there are 10 valence electrons from N.
3. In Mg3N2, Mg donates its 2 electrons to fill the octet of N, and N accepts these electrons.
4. After this, each Mg atom is surrounded by zero dots and each N atom is surrounded by eight dots.

This process represents the Ionic bonding in Mg3N2.

Learn more about Lewis dot structure here:

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In determining the boiling point of solutions, always take note of the number of ions that will dissociate in the solution. It does not depend on the nature of the substance. The greater the number of ions dissociated, the greater is the boiling point of the solution. 

Answer: The correct answer is option B.

Explanation:

pH is defined as negative logarithm of hydrogen ion concentration. It is basically defined as the power of hydrogen ions in a solution. It ranges to the scale of 1-14. The solutions are divided into 3 categories on the basis of the pH range:

1. If the pH of the solution ranges from 1 to 6.9, the solution is said to be acidic. Less the pH, more the acidity of the solution.
2. If the pH of the solution ranges from 7.1 to 14, the solution is said to be basic. More the pH, more the acidity of the solution.
3. If the pH of the solution is 7, the solution is said to be a neutral solution.

We are given:

pH of vinegar = 5

pH of rainwater = 6

As, the pH of both the solutions is less than 7. Thus, both the solutions are acidic in nature and also pH of vinegar is less, so this solution will be more acidic in nature.

Hence, the correct answer is Option B.