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4 years ago

125mm hg into atmosphere

Chemistry

1 answer:

alexdok [17]4 years ago

7 0

Answer:

Explanation:

1atm=760mmHg

Therefore, 125mmHg = 125/760 = 0.164atm

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A thin sheet of aluminum can block _____.

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It can block light. Please mark Brainliest!!!

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3 years ago

How many significant figures are in 0.00375

Galina-37 [17]

Answer:

There are 3 significant figures

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3 years ago

Iron has many isotopes but only 4 are found in significant amounts in naturally found mixtures. The amounts by mass percent are:

AnnZ [28]

Answer:

The average mass of iron to be is 54.76 amu.

Explanation:

Formula used to calculate average atomic mass follows:

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$

Mass of Fe-54 isotope = 53.9396 amu

Percentage abundance of Fe-54 = 5.845%

Fractional abundance of Fe-54 = 0.05845

Mass of Fe-56 isotope = 55.9349 amu

Percentage abundance of Fe-56 = 91.754 %

Fractional abundance of Fe-56= 0.91754

Mass of Fe-57 isotope = 56.9354 amu

Percentage abundance of Fe-57 = 2.119%

Fractional abundance of Fe-57 = 0.002119

Mass of Fe-58 isotope = 57.9333 amu

Percentage abundance of Fe-58 = 0.282%

Fractional abundance of Fe-58 = 0.00282

Average atomic mass of iron :

$=53.9396 amu\times 0.05845+55.9349 amu\times 0.91754 +56.9354 amu\times 0.002119 + 57.9333 amu\times 0.00282=54.76 amu$

The average mass of iron to be is 54.76 amu.

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3 years ago

6. At a glance, it appears like the law of

Mamont248 [21]

Energy and mass equivalence

Explanation:

The law of conservation of energy does not apply to nuclear reactions, the law of conservation of mass-energy makes more sense in this regard.

In nuclear reactions mass is transformed into energy. Therefore, it does not conform with the law of conservation of energy.

According to the law of conservation of energy "energy is neither created no destroyed but they are transformed from one form to another. "
In nuclear reactions, mass is usually lost. Mass is not conserved.
But, the mass is converted into energy and we say there is mass and energy equivalence for nuclear reactions.

Learn more:

Chemical laws brainly.com/question/5896850

#learnwithBrainly

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3 years ago

The strongest intermolecular interactions between hydrogen fluoride (hf) molecules arise from

aliya0001 [1]

Answer:
<span>The strongest intermolecular interactions between hydrogen fluoride (hf) molecules arise from Hydrogen Bonding.

Explanation:
Hydrogen Bond interactions are considered the strongest intermolecular interactions among molecules. These interactions are found between Hydrogen atom of one molecule bonded to most electronegative atoms (i.e F, O, N) and the most electronegative atoms of neighbor molecule.
In case of HF, fluorine has the greatest electronegativity of 4, so the hydrogen bonded to Fluorine becomes partial positive and makes Hydrogen bond with Fluorine atom of </span>neighbor HF molecule.<span />

8 0

3 years ago