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Lunna [17]
3 years ago
11

what evidence is there in the diagrams to support the classification of these substances as elements​

Chemistry
1 answer:
Novosadov [1.4K]3 years ago
5 0

Awnser your loooking fo its got to be aluminium

Explanation:i took the dang subgect

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The speed of an electron is 1.68*10^8m/s what is the wavelength
ziro4ka [17]

Answer:

\lambda =4.33x10^{-12}m=4.33pm

Explanation:

Hello there!

In this case, since the speed, wavelength and mass of an electron are related via the the Broglie wavelength:

\lambda =\frac{h}{m*v}

Thus, by plugging in the mass of the electron and the Planck's constant, we obtain the following wavelength:

\lambda =\frac{6.626x10^{-34}J*s}{9.11x10^{-31}kg*1.68x10^{8}m/s}\\\\\lambda =4.33x10^{-12}m=4.33pm

Best regards!

4 0
3 years ago
Electron dot diagram for four elements are shown. Which element would be found in Group 13?
gladu [14]

Answer:

D. 1

Explanation:

Just took it :)

8 0
3 years ago
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Which type of molecule is used in flavors and perfumes due to their smells?
vazorg [7]

Odorants such as Citronellal, Linalool, Nerolidol

7 0
3 years ago
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In one species of bird, there are three varieties of feather color. What is this an example of?
pishuonlain [190]
Species diversity is the answer
6 0
3 years ago
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Which substance is the oxidizing agent in this reaction? fe2o3+3co→2fe+3co2 express your answer as a chemical formula?
erma4kov [3.2K]
Equation is as follow,

                            Fe₂O₃  +  3 CO     →     2 Fe  +  3 CO₂

Oxidation:

                                        3 CO     →     3 CO₂

Oxidation state of C in CO is +2, and that in CO₂ is +4. So, carbon has lost 2 electrons per mole and 6 electrons per 3 moles hence,

                                 3 CO     →     3 CO₂  +  6 e⁻

Reduction:

                                    Fe₂O₃     →     2 Fe

Oxidation state of Fe in Fe₂O₃ is +3 per atom, and that in Fe is 0. So, Iron has gained 3 electrons per atom and 6 electrons per 2 atoms hence,

                                    Fe₂O₃  +  6e⁻     →     2 Fe

Result:
             Iron in Fe₂O₃ has been reduced in this reaction and has played a role of oxidizing agent by oxidizing carbon from +2 state to +4 state.
4 0
3 years ago
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