I’m confused on the question?
<span>The answer is C.
Outliers are data points that fall way off the average range of values in a dataset. In this case, the number 13 is way off from the
rest of the values which range between 4
and 7. An outlier may represent an error in an
experiment that involved many
treatments. </span>
Earth contains huge quantities of water in its oceans, lakes, rivers, the atmosphere, and believe it or not, in the rocks of the inner Earth. Over millions of years, much of this water is recycled between the inner Earth, the oceans and rivers, and the atmosphere. This cycling process means that freshwater is constantly made available to Earth's surface where we all live. Our planet is also very efficient at keeping this water. Water, as a vapor in our atmosphere, could potentially escape into space from Earth. But the water doesn't escape because certain regions of the atmosphere are extremely cold. (At an altitude of 15 kilometers, for example, the temperature of the atmosphere is as low as -60° Celsius!) At this frigid temperature, water forms solid crystals that fall back to Earth's surface.
Many people live faraway from freshwater sources. They need to carry their water home.
While our planet as a whole may never run out of water, it's important to remember that clean freshwater is not always available where and when humans need it. In fact, half of the world's freshwater can be found in only six countries. More than a billion people live without enough safe, clean water.
Also, every drop of water that we use continues through the water cycle. Stuff we put down the drain ends up in someone or something else's water. We can help protect the quality of our planet's freshwater by using it more wisely.
Answer:
Tell the teacher about the accident right away.
<u>Answer:</u> The percentage abundance of isotope is 69 %.
<u>Explanation:</u>
Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.
Formula used to calculate average atomic mass follows:
.....(1)
We are given:
Let the fractional abundance of isotope be 'x'
- <u>For isotope:</u>
Mass of isotope = 62.93 amu
Fractional abundance of isotope = x
- <u>For isotope:</u>
Mass of isotope = 64.93 amu
Fractional abundance of isotope = (1-x)
- Average atomic mass of copper = 63.55 amu
Putting values in above equation, we get:
Converting this fractional abundance into percentage abundance by multiplying it by 100, we get:
Hence, the percentage abundance of isotope is 69 %.