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Stolb23 [73]
3 years ago
6

Use the drop-down menu to complete the statement. An element is made up of .

Chemistry
1 answer:
Murrr4er [49]3 years ago
6 0

I don't get it, what do you need? a element made up of a "."d dot?

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Calculate the percent of composition of oxygen in Mercury (ll) oxide HgO
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Add up the molar mass of Mercury Oxide, and then divide the molar mass of Oxygen by the molar mass of the compound.

So...

mm of Hg + mm of O= 200.59g + 16g= 217g

16g/217g = .0737... x 100 = 7.37%
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3 years ago
In Nuclear chemistry, the key requirement for a chain reaction is that...a. each event must produce more than one particle capab
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Cccccccccccccccccccccccc

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3 years ago
What is the atomic number of the as yet undiscovered element in which the 8s and 8p electron energy levels?
Andreyy89

The atomic number of the undiscovered element is 168

Element 118 will have just filled its 7p orbitals. therefore the predicted element to fill completely up to its 8 p orbital would have to filled a whole set of s, p, d, f and g orbitals

That's another 2 + 6 + 10 +14 + 18 = 50 electrons

To determine the total number of quantum numbers we have to find

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we have Nml × Nms = ( 2 + 1 ) × 2

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The element right below should be

Z = 118 + 50

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Hence the atomic number of the undiscovered element is 168

Learn more about the atomic number on

brainly.com/question/14514242

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4 0
1 year ago
Naoki's bicycle has a mass of 11 kg. If Naoki sits on her bicycle and starts pedaling with a force of 197.2 N, causing an accele
Cloud [144]

yes 89.75 sorry I'm not the best at math you should look on the internet

7 0
3 years ago
I need help yall ill mark brainliest :)
garri49 [273]

Answer:

How does non-human life in an urban ecosystem differ from that in an undeveloped forest ecosystem?

Explanation:

In forest eco system the people are uncivilized and not so much educated. And in urban eco system people are intelligent as well as educated this is the main reason. In an urban ecosystem, the only non-human life that live there are the ones that are able to survive under the conditions. However, in undeveloped forest ecosystems, there’s barely any pollution. Therefore, a bigger variety of non-human life is able to live here.

Mark brainliest if you can please :)

3 0
3 years ago
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