Chemistry, 02.08.2019 06:30 joannachavez12345

The lewis dot structure for an isolated carbon atom has 1. two pairs of electrons and two lone electrons. 2. one pair of electrons and three lone electrons. 3. two pairs of electrons. 4. four lone electrons. 5. one pair of electrons and two lone electrons.

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Answer is: 5. one pair of electrons and two lone electrons.
Electron configuration for carbon: ₆C 1s² 2s² 2p².
Valence electrons are in 2s and 2p orbitals. There is one pair of electrons in 2s orbital and two lone electrons in 2p orbital with the same electron spin. Carbon is in group 14 of periodic table group.

Answer from: liyah1361

The correct answer is 4. four lone electrons. Carbon is an non metal element in group 4 of the periodic table with four outermost electrons. Lewis dot structure is a diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that exists in the molecule.

Answer from: Quest

answer : (a) volume of the gas = 8.67 × $10^{-3}$ l

(b) second virial coefficient b = -1.21226 l/mole

solution : given, t = 300k

p = 20atm

z = 0.86

n = 8.2 mmoles = 8.2 × $10^{-3}$ moles

r = 0.082 l atm/k/mol

find, (a) volume of gas and (b) second virial coefficient b at 300k.

formula used : $z=\frac{pv}{nrt}$

and $z=1+\frac{b}{v}$

(a) $z=\frac{pv}{nrt}$

$v=\frac{znrt}{p}$

= $\frac{0.86\times 8.2\times[tex]10^{-3}$ \times 0.082\times 300}{20}[/tex]

= 8.67 × $10^{-3}$ l

(b) $z=1+\frac{b}{v}$

$b=(z-1)v$

= (0.00867-1) × 8.659

= - 8.5839 l/mole

Answer from: Quest

The correct answer would be b) volume versus temperature, because they are also directly proportional.

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