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hram777 [196]
3 years ago
8

How do you determine the valence electrons? Ex. Li=?, Be=?, N=?, O=?, F=? (List the charges)

Chemistry
2 answers:
MatroZZZ [7]3 years ago
6 0
By finding what group each is in
JulsSmile [24]3 years ago
4 0
<span>Find a periodic table of elements. ... <span>Label each column on the periodic table of elements from 1 to 18. ... </span><span>Find your element on the table. ... </span>Use the group numbers to determine the number of valence electrons. </span><span>imgres</span>
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8 0
3 years ago
Can some one help with this question too??
ira [324]
Your answer is right tho
7 0
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A chef fills a 50ml container with 43.5g of cooking oil. whats the density of the oil
jasenka [17]
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4 0
4 years ago
Keeping the number of moles constant, what is the final pressure in atm if the temperature was cooled from -91.5°C to -239°C, th
34kurt

Answer:

P2 = 0.935 atm

Explanation:

initial conditions:

∴ V1 = 3.41 L

∴ T1 = - 91.5 °C + 273 = 181.5 K

∴ P1 = 3990 torr * ( atm / 760 torr ) = 5.25 atm

  • PV = RTn

∴ R = 0.082 atm.L / K.mol

⇒ n = P1V1 / RT1 = ((5.25 atm)*(3.41 L)) / ((0.082 atm.L/K.mol)*(181.5 K))

⇒ n = 1.107 mol

final conditions:

∴ V2 = 3.3 L

∴ T2 = - 239 °C = 34 K

∴ n = 1.107 mol

⇒ P2 = nRT2 / V2

⇒ P2 = ((1.107 mol)*(0.082 atm.L/K.mol)*(34 K)) / 3.3 L

⇒ P2 = 0.935 atm

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3 years ago
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