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kogti [31]
3 years ago
8

A geologist is attempting to date a layer of sedimentary rock. He performs radioactive dating using uranium-235, which has a hal

f-life of 703 million years. He determines that the uranium-235 has undergone 3 half-lives. Approximately how old is the rock?
710 billion years

2.11 billion years

710 million years

235 million years

2.11 million years

none of the above
Chemistry
2 answers:
Sindrei [870]3 years ago
6 0
It’s 2.11 billion years
Bad White [126]3 years ago
4 0

Answer:

2.11 billion years.

Explanation:

I hope this helps! Have a great rest of your day!

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Answer:

<em>An intramolecular force is between that atoms makeup a molecule. An intermolecular force is between entire molecules. A non-polar covalent bond occurs when the electrons are equally shared between atoms.</em>

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What is the empirical formula of a compound that contains 25.92 percent nitrogen and 74.07 percent oxygen?
pychu [463]

<span><span>N2</span><span>O5</span></span>

Explanation! 

When given %, assume you have 100 g of the substance. Find moles, divide by lowest count. In this case you'll end up with

<span><span>25.92 g N<span>14.01 g N/mol N</span></span>=1.850 mol N</span>

<span><span>74.07 g O<span>16.00 g O/mol O</span></span>=4.629 mol O</span>

The ratio between these is <span>2.502 mol O/mol N</span>, which corresponds closely with <span><span>N2</span><span>O5</span></span>.

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Answer:

A single compound is simultaneously oxidized and reduced.

Explanation:

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What this means is that; in a disproportionation reaction, only one compound is both oxidized and reduced. This implies that two products are formed during disproportionation. One is the oxidized product while the other is the reduced product.

Consider the disproportionation of CuCl shown below;

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