In questions like this one , you should first read the passage and then read the instructions. DO NOT read the alternatives. Then , with the information you got from the passage , try to awnser the question without looking at the alternatives. Now compare your awnser to the alternatives and eliminate the ones you are sure are wrong.
From the passage you learn that light pollution , caused by man-made lights , sometimes creates fogs and hazes that make the night sky look like a "dark sheet of paper".
If you compare what you understood from the passage to the alternatives , you ll realize that A) is the one that makes more sense and its more compatible with your awnser.
If you eliminated all alternatives you could but there still are 2 choices remaining and you are not sure which one it is , go back to the passage and try to find evidence for each alternative and try to eliminate one of the alternatives
AWNSER : A)
Considering the definition of percentage by mass, the sample of pure lithium nitrate contains 7.99% lithium by mass.
<h3>Definition of percentage by mass</h3>
The percentage by mass expresses the concentration and indicates the amount of mass of solute present in 100 grams of solution.
In other words, the percentage by mass of a component of the solution is defined as the ratio of the mass of the solute to the mass of the solution, expressed as a percentage.
The percentage by mass is calculated as the mass of the solute divided by the mass of the solution, the result of which is multiplied by 100 to give a percentage. This is:
<h3>This case</h3>
Because percent by mass indicates the ratio of solute to solution based on mass, if the sample has twice the mass of the first sample, the ratio remains constant.
So the percentage by mass is the same.
That is, the sample of pure lithium nitrate contains 7.99% lithium by mass.
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Learn more about percent by mass:
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Answer:
The difference is that the cumulative GPA covers shorter periods, like a term or a semester. The overall GPA refers to the average grades obtained by a student throughout his entire academic experience. This means the overall GPA includes grades from all terms and semesters.
(Copied from google)
hope that helps
In order to get good results in relation to observing water pressure at fixtures, it is good inspection procedural practice to inspect the plumbing fixtures at the "pressure gauges"
<h3>What is plumbing fixtures?</h3>
Plumbing fixtures are the devices that can be linked with a plumbing system to deliver fluid or drain it.
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It is common practice for these system to be fitted with a pressure gauges.
Learn more about plumbing fixtures at;
brainly.com/question/12713589
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The correct answer is A. X<3
Please let me know if is right.
