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3 years ago

So why di fishes not have legs\

Chemistry

1 answer:

marin [14]3 years ago

5 0

Answer:

Fish need to be aerodynamic to move quickly. If they had legs they woulf be less aerodynamic and unable to get away from predators.

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Which element would have the greater difference between the first ionization energy and the second ionization energy

andrew-mc [135]

Answer:

Lithium has the greatest difference between its first and second ionization energies.

8 0

3 years ago

You have 16.0 g of some compound and you perform an experiment to remove all of the oxygen, 11.2 g of iron is left. What is the

oksian1 [2.3K]

The empirical formula of this compound is equal to $Fe_{2}O_3$ .

<h3>Empirical formula</h3>

To calculate the empirical formula of a compound, it is necessary to know the number of moles present.

Therefore, we will use the molar mass of iron and oxygen to find the amount of moles, so that:

$MM_O = 16g/mol\\MM_Fe = 55.8g/mol$

$MM = \frac{m}{mol}$

Oxygen

$16 = \frac{4.8}{mol}$

$mol = 0.3$

Iron

$55.8 = \frac{11.2}{mol}$

$mol = 0.2$

Finally, as the empirical formula is composed of integers numbers of moles, just multiply the values by the smallest common factor to transform into an integer, so that:

O => $0.3 \times 10 = 3moles$

Fe => $0.2 \times 10 = 2moles$

So, the empirical formula of this compound is equal to $Fe_{2}O_3$

Learn more about empirical formula in: brainly.com/question/1363167

6 0

3 years ago

Describe some of the practical uses of controlled fission reactions.

Katarina [22]

By the process of Nuclear Fission:
1) We Generate Electricity. - If the process is controlled, then we can do this. It's very better way to generate electricity. 'cause of it's many advantages, all nation wants to enhance their electricity production through this mean.

2) We Create explosive. - Again, with the help of nuclear fission we can create certain helpful bombs like Atom Bomb which will help us in war.

Hope this helps!

4 0

3 years ago

Read 2 more answers

Heating gas to create plasma can yield

topjm [15]

Hey there, The answer is A. Free electrons.

4 0

3 years ago

A lemon appears yellow because it _________ all other colors of light and ________ yellow.

neonofarm [45]

Overrides all the other colors of light and green yelow.

5 0

4 years ago