Answer: option 1. different molecular structures and different properties.
Explanation:
1) O₂ and O₃ are different forms of the same element, in the same physical state (gaseous).
2) That is what is called allotropes.
3) The definition of allotropes is different forms of an element with different structures and different properties in the same physical state.
Graphite and diamond is other example of common allotropes.
4) O₃ and O₂ have the same kind of atoms (oxygen), but they are bonded differently (different structure, one molecule has 3 atoms, other 2 atoms) which conferes them different properties (e.g. different odor, different chemical reactivity).
The pH of the solution created is 7.21
Explanation:
Ka1 = 6.9 X 10⁻³
Ka2 = 6.2 X 10⁻⁸
Ka3 = 4.8 X 10⁻¹³
pKa = - log( Ka)
Thus,
pKa1 = - log ( 6.9 X 10⁻³) = 2.16
pKa2 = - log ( 6.2 X 10⁻⁸ ) = 7.21
pKa3 = - log ( 4.8 X 10⁻¹³ ) = 12.3
KH₂PO₄ + Na₂HPO₄ = KH₃PO₄ + Na₂PO₄
Ka2 = [ KH₃PO₄] [Na₂PO₄] / [KH₂PO₄] [Na₂HPO₄]
log (Ka2 ) = log [[ KH₃PO₄] [Na₂PO₄] / [KH₂PO₄] [Na₂HPO₄]]
pH = pKa2 + log [KH₂PO₄] /[Na₂HPO₄] = 7.21
Therefore, the pH of the solution created is 7.21
B. Henry Knox
C. George Washington
D. Lord Howe
Vinegar dissolve in water but oil does not because vinegar is polar like water, but oil is nonpolar and the correct option is option C.
The dissolving process depends on the polarity of the substances involved. Water is a polar molecule, meaning it has a positive and negative end, while vinegar contains acetic acid, which is also polar. Since both water and vinegar are polar, they can mix and dissolve in each other easily.
On the other hand, oil is nonpolar, meaning it lacks a positive and negative end. Because of this, oil cannot dissolve in water, which is polar. Instead, oil and water will separate into distinct layers. This phenomenon is due to the "like dissolves like" rule, where polar substances dissolve best in polar solvents and nonpolar substances dissolve best in nonpolar solvents.
Thus, the ideal selection is option C.
Learn more about Polar and nonpolar substances, here:
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A charged group of covalently bonded atoms is known as a polyatomic ion or molecular ion; this is a group of atoms sharing electrons through covalent bonds and carrying an overall charge.
A charged group of covalently bonded atoms is known as a polyatomic ion or a molecular ion. These ions are formed when a group of atoms such as ammonium (NH4+), nitrate (NO3-), or sulfate (SO42-) share electrons through covalent bonds and also carry an overall charge. This net charge results from an excess or a deficiency of electrons compared to the total number of protons in the ion's atoms.
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Answer: TRUE
Explanation:
Deductive reasoning is a process in which a conclusion is drawn on the basis of similarities and concordance with pre- proposed principles and multiple premises which are expected and assumed to be true.
In simple words the deductive reasoning is based upon conclusion which is derived from one or more statements or principles which are expected to be true.
On the basis of the above explanation, the statement Drawing a conclusion derived from knowledge of an established principle is called deductive reasoning. is true.