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dolphi86 [110]
4 years ago
6

Mendeleev created the first periodic table by arranging the elements in the order of ?

Chemistry
1 answer:
Maslowich4 years ago
4 0
Mendleev arranged his periodic table in order of Atomic Mass...
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How many moles of Cl2 is needed to reacts with 4 moles of C2H2?
borishaifa [10]

Answer:

73.9 moles

Explanation:

7.39x10

3 0
4 years ago
What is the role of neutrons in the nucleus of an atom?
zhenek [66]
Neutrons keep the Protons "in check", meaning Protons hold a very strong repulsive positive charge. The Neutrons counteract the repulsive force within a small space to keep the Nucleus stable.

I hope this helps! :)
4 0
4 years ago
In the laboratory you dissolve 12.3 g of chromium(ii) sulfate in a volumetric flask and add water to a total volume of 375. ml.
valentinak56 [21]
Hope it cleared your doubt.

4 0
3 years ago
The vapor pressure of water at 0c is 4.579 mmhg what is this pressure in pascals
Tom [10]
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8 0
3 years ago
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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