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bixtya [17]
3 years ago
13

Why does this experiment need a water pump?

Chemistry
1 answer:
ICE Princess25 [194]3 years ago
5 0

Answer:

because the water/air needs to be pumped out.

Explanation:

hoped this helped! (just give it a 1 star if it didn't)

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A calcium atom (Ca) will lose or gain electrons
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To become an ion a calcium atom would have to lose 2 electrons.
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How many electrons are transferred when magnesium bonds ionically with oxygen
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2 electrons from magnesium (Mg) is transferred to oxygen (O2) to form Mg2+ and O2-

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Find the empirical formula of the following compound: 0.77 mol of iron atoms combined with 1.0 mol of oxygen atoms.
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The empirical formula is Fe₃O₄.

The empirical formula is the <em>simplest whole-number ratio of atoms</em> in a compound.

The ratio of atoms is the same as the ratio of moles, so our job is to calculate the molar ratio of Fe to O.

I like to summarize the calculations in a table.

<u>Element</u>   <u>Moles</u>    <u>Ratio</u>¹   <u>×3</u>²   <u>Integers</u>³

    Fe         0.77       1         3             3

    O           1.0         1.3      3.9          4

¹ To get the molar ratio, you divide each number of moles by the smallest number (0.77).

² If the ratio is not close to an integer, multiply by a number (in this case, 3) to get numbers that are close to integers.

³ Round off these numbers to integers (3 and 4).

The empirical formula is Fe₃O₄.

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3 years ago
What makes an isotope of an element
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Isotopes of an element share the same number of protons but have different numbers of neutrons. ... This means that all three isotopes have different atomic masses (carbon-14 being the heaviest), but share the same atomic number (Z=6).

Explanation:

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