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3 years ago

Which of the following must happen

SAT

1 answer:

Lubov Fominskaja [6]3 years ago

8 0

Answer:B

Explanation:

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What is the remainder when (x4 36) is divided by (x2 – 8)? 36 64 100 117

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Answer:

100

Explanation:

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2 years ago

Which of the following statements about attention deficit hyperactivity disorder (ADHD) is true

Nana76 [90]

The statement about ADHD that is true is: "ADHD has no clear physical symptoms that can be detected via an x-ray or blood test"

This is an acronym for a kind of mental disorder that is called Attention Deficit Hyperactivity Disorder (ADHD).

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It is characterized by challenges concentration, excessive activity, or difficulty restraining behavior that is inappropriate for a man's age.

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1 year ago

Which example shows an advantages of owning a car over leasing one?

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2 years ago

Which equation is the perpendicular bisector of the line segment with endpoints (-2, 4) and (6, 8)?

serious [3.7K]

Answer:

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2 years ago

A sample of pure lithium nitrate contains 7. 99% lithium by mass. What is the % lithium by mass in a sample of pure lithium nitr

Shalnov [3]

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:

$percentage by mass=\frac{mass of solute}{mass of solution}x100$

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:

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2 years ago