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3 years ago

2 moles Fe= how many Fe atoms

Chemistry

1 answer:

vagabundo [1.1K]3 years ago

4 0

2(6.022137 × 10^23) since one mole is equal to 6.022137 × 10^23 atoms

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Elements that do not have full outer electron shells will donate, share, or take from other atoms. Choose the items that have th

Gnesinka [82]

Answer:

Ok...

Answer: YTH/JYG

Explanation:

AI+ZN+H=YTH

7 0

4 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

3 years ago

Explain the differences in the solubilities of the gases in the table by completing the following sentences.

Schach [20]

1. Compared to oxygen, nitrogen's __________ makes it more difficult for water molecules to the surround nitrogen molecules.
2. The high solubility of sulfur dioxide can be explained by its ____________. 
3. Nitric oxide is more soluble than nitrogen and oxygen because of its _______________. 
4. Compared to nitrogen, the ___________ of ethylene makes it more soluble in water. 

CHOICES are: 
a. shorter bond length 
b. ability to react with water 
c. larger molecular size 
d. polarity

answers: a, b, d, c.

7 0

4 years ago

How many pili are in a bacterial cell

Snowcat [4.5K]

Answer: Bacterial species where observed Typical number on cell Distribution on cell surface

Escherichia coli (common pili or Type 1 fimbriae) 100-200 uniform

Neisseria gonorrhoeae 100-200 uniform

Streptococcus pyogenes (fimbriae plus the M-protein) ? uniform

Pseudomonas aeruginosa 10-20 polar

Explanation:

Pili are structures that extend from the surface of some bacterial cells.

These are hollow, non-helical, filamentous appendages.

Hope it helps you

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3 years ago

Jordan is doing a science fair project on the effect of music on the growth of tomatoes. He has two tomatoe plants,plant A and p

krek1111 [17]

The control group is the type of tomato the plants are.
The independent variable is the type of music played.
The dependent variable is Plant A and B's growth.
His conclusion should be that music does not affect the growth of tomatoes.
He should make sure both plants were getting the same amount of water, soil, light, seed, and fertilizer so that can't affect the tomatoes in any way.

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4 years ago