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.
.
Learn more about percent by mass:
brainly.com/question/18646836?referrer=searchResults
The statement 'nonstandard forms of English can be as effective as the standard form of English' can be extracted in the excerpt from "Mother Tongue".
<h3>What is a mother tongue?</h3>
A mother tongue refers to a special language spoken by society and adopted as its own by its habitants.
There are many countries around the world that adopted English as their mother tongue and expressions in such countries may be certainly effective.
Mother tongue makes also reference to the language which an individual speaks from his/her childhood.
Learn more about the “Mother Tongue” excerpt here:
brainly.com/question/10046495
<span>The gospel of Luke isn't dedicated to anyone it was given to a Roman Governor named Theophilus. Luke gave him the gospel and the book of acts to try and convince him to convert to Christianity and then so the rest of Rome would no more of Christianity and possibly convert.
</span>