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3 years ago

What is the molar mass of al2s3

Chemistry

1 answer:

nasty-shy [4]3 years ago

7 0

$al = 2 \times 27 = 54 \\ s = 3 \times 32 = 96 \\ 54 + 96 = 150 \\ the \: molar \: mass \: of \: al2s3 \: = 150$

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makkiz [27]

Answer:

18 electrons

Explanation:

Note: The third energy level can actually hold up to 18 electrons, so it is not really filled when it has 8 electrons in it.

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2 years ago

What is the name of this molecule?

mina [271]

D. 1-butyne.

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2 years ago

B A. refraction B. Diffraction C. angle of reflection D. angle of incidence

saw5 [17]

Answer:

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Explanation:

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2 years ago

Read 2 more answers

How many moles of solute are in a 15 M solution that has a volume of 2 liters?

Gelneren [198K]

Answer:

30 moles of solute

Explanation:

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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.

5 0

2 years ago