Answer:
The answer is in the problem
Explanation:
As general rule of number of oxygen is -2:
O → -2
Alkali metals (Li, Na, K) are always +1
Na → +1
Alkali earth methals (Be, Mg, Ca...) are always +2
Ca → +2
The halogen group (F, Cl, Br...) is always -1
F → -1
The oxidation number of Si (+/- 4)
Aluminium is, usually +3
And to complete the octet rule in nitrogen, 3 electrons are required. That means:
N → -3
The correct answer is: [C]:
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"<span>pressure and the number of gas molecules are directly related."
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<u>Note</u>: The conclusion was: "</span> as the pressure in a system increases, the number of gas molecules increases" — over the course of many trials.
This means that the "pressure" and the "number of gas molecules" are directly related.
Furthermore, this conclusion is consistent with the "ideal gas law" equation:
" PV = nRT " ;
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in which:
"P = Pressure" ;
"n = number of gas molecules" ;
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All other factors held equal, when "n" (the "number of gas molecules")
increases in value (on the "right-hand side" of the equation), the value for "P" (the "pressure" — on the "left-hand side" of the equation), increases.
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<span>A two phase mixture is a mixture of two different substances. for
example, a soft drink ( liquid and gas). to separate these two
substances, you could heat the liquid and then capture the carbon
dioxide.Also this is a question you need to answer for yourself there is many answers.</span>
Explanation:
Monodentate ligands are the ligands which bind through only one donor atom. Example: chloride ion.
Monodentate ligands are the ligands which bind through two donor atom. Example: ethylenediamine.
When ligands bond with transition metal ion, repulsion between electrons in ligands and electrons in d orbitals of metal ion takes place which raises energy of d orbitals which causes the light to fall in the visible region.
Coordination number is number of donor atoms attached to central ion in a coordination complex. Coordination number of the chromium(III) is usually 6 means that usually chromium(III) bond to 6 ligands and form an octahedral complex.
Protons and neutrons. Electrons are on the outside layers. Protons are the ones with a positive charge and neutrons have a neutral charge. Electrons have a negative charge. Hope this helps :)