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zepelin [54]
2 years ago
15

4.13 moles of chromium (III) nitride weighs how much?

Chemistry
1 answer:
Leya [2.2K]2 years ago
3 0

Answer: 272.5915639999...

Explanation:

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Mamont248 [21]

Answer:

I think the answer is B or Compounds

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2 years ago
Plz help me with these three please please !!!!!
Novay_Z [31]

Explanation:

Cations are positively charged ions with fewer electrons than protons. To partake in reaction, metals lose electrons to achieve a stable octet configuration. It has lost valence electrons and wold have a positive charge associated with it.

Potassium is a group 1 element. A metal.

Potassium has 1 valence electron so it loses the valence electron to form a stable octet.

A potassium ion has a positive charge and therefore cannot be an anion but is a cation.

The group number pretty much denotes the number of valence electrons.

Group 1 = 1

Group 2 = 2

Group 17 = 7

Group 18 = 8

4 0
3 years ago
Which pair of elements can be used to determine the age of a fossil that is over one billion years old?
lakkis [162]

Answer:

Explanation:

There are some radioactive nuclides can be used to measure time on an archeological scale. One is the best example of this is radiocarbon dating. This process is based on the ratio of caebon-14 to carbon-12 in the atmosphere which is relatively constant.

The half time of C-14 5730 years  

Carbon-14 is a radioactive nucleus. It has a half-life of 5730 years.

All living tissues like plants and animal absorbed carbon-12 along with carbon-14 with same ratio of caebon-14 to carbon-12 in the atmosphere.

Carbon-14 dating is based on the ratio of carbon-14 to carbon-12 in the atmosphere which is relatively constant

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3 years ago
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What are the examples of all the non metals in the first twenty element​
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Answer:

semimetals or metalloids.

Explanation:

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Which properties of a substance could change during a<br> PHYSICAL change?
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