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3 years ago

Which of the following best explains why the tundra is one of the least biologically diverse biomes

Chemistry

1 answer:

trapecia [35]3 years ago

8 0

weather

plants don't survive in the extreme cold and ice that cover these regions year-round.

less plants less animals

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Which property of a mineral sample does not influence how quickly it settles in water? 1) density 2) hardness 3) shape 4) size

satela [25.4K]

<h3><u>Answer</u>;</h3>

4) size

<h3><u>Explanation</u>;</h3>

The mineral’s physical properties are used in identifying minerals and are determined by its chemical composition and crystal structure.
<u>Streak</u> is the color of the mineral in powdered form and since it is a more accurate illustration of the mineral’s color, its is a more reliable property of minerals than color for identification.
<u>Hardness</u> is one of the better properties of minerals to use for identifying a mineral. Hardness is a measure of the mineral’s resistance to scratching.
<u>Density</u> may be used to identify minerals. It is used to describe the amount of matter in a certain amount of space. Substances that have more matter packed into a given space have higher densities.

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3 years ago

The blackbody curve for a star named beta is shown below. The most intense radiation for this star occurs in what spectral band?

Viefleur [7K]

The answer is Infrared.

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3 years ago

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If an element only partially conducts electricity, it would be part of the _______ category. *

dmitriy555 [2]

It would be in the transition metals

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3 years ago

Explain Newton's second law

zhenek [66]

Answer:

The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object

Explanation:

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3 years ago

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The ratio of nitrogen to oxygen by mass in NO is 7.0:8.0. Identify the ratio of nitrogen to oxygen by mass in NO2 and N2O7 .

Rus_ich [418]

This problem is providing the ratio of nitrogen to oxygen by mass in nitrogen monoxide, NO, as 7.0:8.0 and asks for the same ratio but in NO₂ and N₂O₇. After doing the calculations, the results are 7.0:16.0 and 1.0:4.0 respectively.

<h3>Mass ratios:</h3>

In chemistry, one can calculate the mass ratios in chemical formulas according to the atomic mass of each atom. In such a way, one knows the mass ratio of nitrogen to oxygen in NO is 7.0:8.0 because we divide the atomic mass of nitrogen by oxygens:

$\frac{14}{16}=\frac{7.0}{8.0}$

Now, for chemical formulas with subscripts, one must multiply the atomic mass of the element by the subscript in the formula, which is the case of NO₂ and N₂O₇ as shown below:

$NO_2:\frac{14}{16*2}=\frac{14}{32} =\frac{7.0}{16.0} \\
\\
N_2O_7:\frac{14*2}{16*7}=\frac{28}{112} =\frac{1.0}{4.0}$

Therefore, the results for NO₂ and N₂O₇ are 7.0:16.0 and 1.0:4.0 respectively

Learn more about atomic masses: brainly.com/question/5566317

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3 years ago