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levacccp [35]
4 years ago
5

PLEAAAASSE HELP FINAL EXAM Magnesium has 2 valence electrons. Sulfur has six valence electrons. What is the correct formula for

magnesium sulfide? A. MgS B. Mg2S C. MgS2 D. Mg2S3
Chemistry
1 answer:
AleksandrR [38]4 years ago
6 0

Answer:

A

Explanation:

need 8 valence electrons

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3 years ago
How are the elements organized on the periodic table
Inessa [10]

Answer: By atomic number

5 0
4 years ago
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How much work is done in moving a load 15 meters using a force of 15 Newton’s
Svetradugi [14.3K]
Answer: 225 joules.

Explanation:


If this a one dimension problem, this is the motion is in the same direction of the force, the equation for work is:
Work = distance × force
⇒ Work = 15 m × 15 N = 225 joules.
This is a special case of the general equation 

Work = |F| |displacement| cosine (angle between the force and displacement)


When force and displacement are in the same direction, the angle is 0, so cos(0) = 1. This is the two vectors are parellel and the work is just the product of the two magnitudes (force and distance)
3 0
3 years ago
(20 Ponits) Gram-negative bacteria are associated with pathogens like e. coli. What is the best synonym for "pathogen"?
Natalka [10]

The best synonym for pathogen would be disease causing microbe. The definition for pathogen is - An agent that causes disease, especially a living microorganism such as a bacterium, virus, or fungus.

3 0
4 years ago
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A pure liquid has a constant boiling point, but a liquid with a constant boiling point is not necessarily pure. Explain.
Brums [2.3K]

A pure liquid has a constant boiling point (at constant pressure). A change in boiling during distillation is an indication of impurity. The opposite, proposition, however, is not always true, and a constant boiling point does not necessarily mean that the liquid is pure.

This is because, at the boiling point, vapor and liquid are in equilibrium, and, if the composition of the vapor and liquid remains constant through the process, the temperature will also remain constant.

The boiling point can differ by location depending on pressure. Why does not a pure liquid in a distilling flask vaporize all at once whilst the boiling temperature is reached? Additional heat must be supplied for a phase change to occur.

Learn more about a boiling point here brainly.com/question/40140

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