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Georgia [21]
3 years ago
5

What element has an atomic mass 4?

Chemistry
2 answers:
Daniel [21]3 years ago
4 0

Answer:

Helium has atomic mass  4.002602.

So the answer to yr question is helium.

ollegr [7]3 years ago
4 0
The answer is helium
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GIVE THE DEFINITION OF EACH WORD.
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7 0
2 years ago
A boron atom has ____ electrons at the first energy level and ____ electrons at the second energy level.
mylen [45]

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5 0
3 years ago
Can someone help me
noname [10]
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4 0
3 years ago
Hydrochloric acid reacts with sodium hydroxide to form water and sodium chloride. Hydrochloric acid is an extremely acidic, clea
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The answer is C.

You're welcome!

7 0
2 years ago
A compound is found to be 38.76% calcium, 19.97% phosphorous and 41.28% oxygen. What is the empirical formula for this compound?
motikmotik

The empirical formula is Ca₃P₂O₈.

<em>Assume</em> that you have 100 g of the compound.

Then you have 38.76 g Ca, 19.97 g P, and 41.28 g O.

Now, we must convert these <em>masses to moles</em> and <em>find their ratio</em>s.

If the number in the ratio are not close to integers, you <em>multiply them by a numbe</em>r that makes them close to integers.

From here on, I like to summarize the calculations in a table.

<u>Element</u>  <u>Mass/g</u>     <u> Moles  </u>      <u> </u><u>Ratio </u>    <u>   ×2    </u>   <u>Integers</u>  

     Ca       38.76      0.967 07     1.4998   2.9995         3

     P         19.97       0.644 82     1             2                   2

     O        41.28       2.580 0       4.0011   8.0023          8

The empirical formula is Ca₃P₂O₈.


3 0
2 years ago
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