Remember, electronegativity is a measure of how strongly an atom bonds to its electrons i.e. the likelihood of an atom to attract an electron.
If you think about it, the less electron shells the atom has, the stronger the electrons will bond to the atom. Furthermore, the greater the atom's atomic mass, the more the electrons will be attracted to it.
Knowing this, we're looking for the element that is farthest to the left and bottom of the periodic table. So Francium (Fr) will be your answer.
Explanation:
The main additive has traditionally been 10% methanol, giving rise to the term "methylated spirits". Other typical additives include isopropyl alcohol (IPA), acetone, methyl ethyl ketone (MEK), and methyl isobutyl ketone (MIBK). CAS number depends on denaturant used.
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Answer:
ΔSmix,m = 5.7628 J/K.mol
Explanation:
mix: A + B
∴ nA = x mol A
∴ nB = y mol B
⇒ n mix = x + y = 1 mol
∴ P total = 1 bar
∴ T: constant
entropy of gases when mixing:
- ΔSmix = - nA*R*LnXA - nB*R*LnXB
∴ XA = x/1 = x
∴ XB = y/1 = y
⇒ ΔSmix = - x*R*Lnx - y*R*Lny
assuming: x = y = 0.5 mol
⇒ ΔSmix = - (0.5)(R)(- 0.693) - (0.5)(R)(- 0.693)
⇒ ΔSmix = (0.3465)(R) + (0.3465)(R)
⇒ ΔSmix = (0.6931)(R)
∴ R = 8.314 J/K.mol
⇒ ΔSmix,m = (0.6931)(8.314 J/K.mol)
⇒ ΔSmix,m = 5.7628 J/K.mol
The answer is B2. The configuration has six electrons. B2 is
the only answer choice that has six valence electrons. Boron is a chemical
element with symbol B and atomic number 5. Shaped completely
by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, it
is a low-abundance element.