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3 years ago

Can rotation and revolution occur at the same time? Explain.

Chemistry

1 answer:

Ipatiy [6.2K]3 years ago

5 0

Answer:

yes

Explanation:

Revolution is the movement of an object around another object. So, Earth revolves around the Sun, and the Moon revolves around Earth. At the same time, Earth and the Moon are also rotating. Earth's rate of revolution is about 365 days (one year), and its rate of rotation is about 24 hours (one day).

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Will you use CRISPR to genetically alter a preborn organism or will you inject it into a fully formed organism? (Please fully ex

valkas [14]

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3 years ago

The electron ____ of an element shows the arrangement of electrons within an atom

Verdich [7]

The electron ring dors

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3 years ago

Which formula represents a

Gre4nikov [31]

Answer:

A. H2O

Explanation:

Let us first define the three types of bonds:

1. Nonpolar Covalent: electronegativity difference < 0.4

2. Polar Covalent: electronegativity difference between 0.4 and 1.8

3. Ionic: electronegativity difference > 1.8

This will help us eliminate choices C and D:

-NaCl has a electronegativity difference of 3.0 - 0.9 = 2.1 (ionic bond)

-Cl2 has a electronegativity difference of 3.0 - 3.0 = 0 (nonpolar covalent bond)

However, we still have two more options, A and B, but they are not diatomic for us to use the electronegativity differences with.

We must now consult their geometries. Because CO2 has a linear geometry (O=C=O), the two sides will cancel each other out, resulting in a nonpolar covalent bond. At this point, by process of elimination, we can already determine the answer to be A. H2O. We can verify this by looking at the geometry of H2O, which is bent (H-O-H; imagine the O is above the H's, I cannot draw it in this response). H2O's bent geometry classifies it as polar covalent; the electrons are slightly more attracted towards the O, the more electronegative element. Side note: this makes the O slightly more negative in charge, whilst the H's are slightly more positive in charge.

P.S. I apologize for not being able to draw and demonstrate that last paragraph, but I hope you get a general idea. You can search up the "H2O geometry" and "CO2 geometry" to get a better idea! :)

8 0

3 years ago

Fill in the blanks: 87 pg = [? ]x10^[?]g

jeyben [28]

87 picograms are equivalent to $8.7\times 10^{-11}$ grams.

This is a unit problem, in which a derived unit must translated into a fundamental unit. A picogram is a equivalent to a trillionth of a gram, which is the fundamental SI mass unit. Mathematically speaking, we have the following equivalence:

$1\,pg = 1\times 10^{-12}\,g$

Now we proceed to find the equivalent value for this case:

$87\,pg$

$87\times 10^{-12}\,g$

$8.7\times 10^{-11}\,g$

87 picograms are equivalent to $8.7\times 10^{-11}$ grams.

To learn more on unit conversions, we kindly invite to check this verified question: brainly.com/question/13016491

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3 years ago

what does NaBr + Ca(OH)2 -> CaBr2 + NaOH create? is it a physical or chemical or physical? for an example for what does it cr

konstantin123 [22]

Answer: The given reaction is a chemical change and equation for rust is given below.

Explanation:

A chemical change is defined as the change where a change in the chemical composition takes place and results in the formation of a new substance. These reactions are usually an irreversible reaction.

A physical change is defined as the change in the shape and size of a substance. No change in the composition of a substance takes place as no new substance is formed. These reactions are usually reversible reaction.

For the given reaction:

$2NaBr+Ca(OH)_2\rightarrow CaBr_2+2NaOH$

The given reaction is a chemical change because new substances are being formed. This is an example of double displacement reaction because exchange of ions is taking place.

The formation of rust is also a chemical change because a reddish-brown coating on iron metal is being formed which is the rust. The equation for the following chemical change is:

$4Fe(s)+3O_2(g)\rightarrow 2Fe_2O_3(s)$

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3 years ago