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makkiz [27]
3 years ago
5

When does a lunar eclipse occur?​

Chemistry
2 answers:
Bezzdna [24]3 years ago
7 0

Answer:

A lunar eclipse occur when the Moon moves into the earths shadow.

cluponka [151]3 years ago
5 0

Answer:

A partial lunar eclipse occurs when the Earth moves between the Sun and Moon but the three celestial bodies do not form a straight line in space. When that happens, a small part of the Moon's surface is covered by the darkest, central part of the Earth's shadow, called the umbra.

Explanation:

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Calculate the [H3O+] of an aqueous solution that is 2.42 × 10−7 M in OH−.
kompoz [17]

Answer:

The (H30+) is 4,13x10-8

Explanation:

We use the formula

Kwater = (H30 +) x (OH-)

1.00e-14 = (H30 +) x 2.42e-7

(H30 +) = 1.00e-14 / 2.42e-7 = 4.13e-8M

4 0
4 years ago
Many electrophilic aromatic halogenations require the presence of aluminum trihalide (halide-chloride or bromide) as a catalyst.
mixas84 [53]

Answer: The aluminium trihalide assists in the heterolytic bond fission of the bromine molecule.

Explanation:

The electrophilic aromatic bromination of acetalinide with molecular bromine requires the formation of Br+. This specie is formed when an Aluminum trihalide reacts with bromine. The Br-Br bond breaks heterolytically such that charged species are produced. This Br+ participates in the electrophilic aromatic substitution and AlX4- is formed where X4 shows a tetrahalide complex of aluminium

5 0
4 years ago
Find the place of the digit 1 in the number 81389398.
dlinn [17]

Answer:

millions

Explanation:

the 1 is seven decimbal places to the left (seven places left of zero), which is the millions place

5 0
3 years ago
Read 2 more answers
Describe the molecular structure of water
Jlenok [28]

Answer:

See attached

Explanation:

3 0
3 years ago
Help please! What is the mass of the iron (Fe) involved in this reaction? Identify the following equations as balanced or unbala
eimsori [14]
<h2>Question 1:</h2><h3>32g + <u><em>56g</em></u> --> 88g</h3>

This one's just a simple math problem. Do 88 - 32, which is 56. You can also find the same answer by looking for the atomic mass of iron (Fe), which rounds up to 56.


<h2>Question 2:</h2><h3>This equation is <u><em>balanced</em></u>.</h3>

On the left side, there is 2 Nitrogen (because of the subscript), and 6 Hydrogen (3 x 2 = 6). On the right side, there is 2 Nitrogen (because of the coefficient), and 6 Hydrogen. (2 x 3 again) There are 2 Nitrogen and 6 Hydrogen on each side, therefore the equation is balanced.


<h2>Question 3:</h2><h3>This equation is <em><u>unbalanced.</u></em></h3>

On the left side, there are 2 Nitrogen (N) and 2 Hydrogen (H). On the right side, there is 1 Nitrogen and 6 Hydrogen. There are 2 Nitrogen and 2 Hydrogen on one side, while the other only has 1 Nitrogen and 6 Hydrogen. Therefore the equation is unbalanced.


<h2>Question 4:</h2><h3>This equation is <em><u>balanced.</u></em></h3>

On the left side, there are 2 Chromium (Cr) and 6 Chlorine (Cl). On the right side, there are 2 Chromium and 6 Chlorine. There are 2 Chromium and 6 Chlorine on each side, therefore the equation in balanced.

~~~~~~~~~~~~~~~~~~~~~~~

If something is confusing or doesn't make any sense, feel free to let me know! ^^

6 0
4 years ago
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