How do paragraphs 7-8 contribute to the development of ideas in the text?.

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.

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Learn more about percent by mass:

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3 0

2 years ago

Ivan was given two data sets, one without an outlier and one with an outlier. data without an outlier: 108, 113, 105, 118, 124,

Debora [2.8K]

Median is the middle data in the list of the given numbers. In the given data set the median gets decreased by the presence of the outlier. Thus, option C is correct.

<h3>What is an outlier?</h3>

An outlier is a data that varies significantly from the other data set, due to some error or measuring variability.

The median of the data without outlier is calculated as:

First, data is arranged in the ascending order: 105, 108, 109, 113, 118, 121, 124

Median = $\rm \dfrac{7 + 1 ^{th}}{2} term$

= 4th term

= 113

The median of the data with outlier is calculated as:

First, data is arranged in the ascending order: 61, 105, 108, 109, 113, 118, 121, 124

Median = $\rm \dfrac{(\dfrac{8}{2})^{th} + (\dfrac{8}{2} + 1)^{th}} {2}$

= (109 + 113) ÷ 2

= 111

Therefore, the outlier decreased the median.

Learn more about median here:

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6 0

2 years ago

This is a statement that leads to a contradictory situation in which something seems both true and false.

olganol [36]

Answer:

I don't know what to put up here but I hope this helped.

Explanation:

Metaphor This is a direct comparison of two things, in which they are said to be (in some sense) the same thing. Metonymy This is a figure of speech in which one word or phrase is substituted for another with which it is closely associated.

7 0

3 years ago

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How do you solve this kind of problem?

katen-ka-za [31]

First, we want to solve for b.

In order to solve for b, we plug in x=6 and f(x)=7 into the equation, since we know f(6)=7

7 = (3/2)(6) + b

7 = 9 + b

Subtract both sides by 9

b = -2

Now, let's insert this value into the equation

f(x) = (3/2)x - 2

Now, plug in x = -2 into the equation to calculate f(-2)

f(-2) = (3/2)(-2) - 2

= -3 -2

= -5

Thus, your answer is A.

Have an awesome day! :)

4 0

3 years ago

can someone post some questions and give me brainliest I'll give you brainliest and follow, like and rate it 5☆

tatyana61 [14]

Answer:

okay i can :) in like a few minutes just doing some hw rn and i’ll do it

Explanation:

3 0

3 years ago

Read 2 more answers