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Vanyuwa [196]
3 years ago
12

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
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