In the generation of most anions, the energy change (kJ/mol) that an electron is

Question

In the generation of most anions, the energy change (kJ/mol) that an electron is removes, positive adds, positive removes, negative adds, negative None of the above is correct A closed-end manometer was attached to a vessel containing argon. The difference in the mercury levels In the two arms of the manometer was 12.2 cm Atmospheric pressure was 783 mm Hg The pressure of the argon in the container was mm Hg 122 661 771 795 882 A sample of a gas (5.0 mol) at 1 0 atm Is expanded at constant temperature from to 10 L to 15 L. The final pressure is atm. 1.5 7.5 0.67 3.3 15 The density of N_2O (laughing gas) at 1 53 atm and 45.2 degree C is g/L 18.2 1.76 0.388 9.99 2.58 The molecular weight of a gas that has a density of 5.75 g/L at STP is g/mol 3.90 129 141 578 1 73 times 10^-3 Electronogativity from left to right within a period and from top to bottom within a group decreases, increases increases, decreases Increases, increases stays the same, increases increases, stays the same

Explanation / Answer

8) the energy change in formation of anion is when electron is added and energy is released (so enthalpy is negative)

9) Pressure = h X density X gravity

10) temperature is constant

P1V1 = P2V2

1 X 10 = 15 X P2

V2 = 0.67atm

11) Density = Mass / Volume

PV = nRT

n = Mass / molecular weight

Pressure = Mass X R X T / Volume X molecular weight = density X R X T / molecular weight

Density = Pressure X mol wt / R X T

R = 0.0821 L atm / mol K

T =45.2 C = 45.2 + 273.15 = 318.35 K

Pressure = 1.53 atm

Mol wt = 60g / mole

Density = 1.53 X 60 /0.0821 X 318.2 = 3.514 g / L

12) similar to above question

Density = Pressure X mol wt / R X T

Mol wt = Density X R X T / Pressure = 5.75 X 0.0821 X 273.15 / 1 = 128.95 g / mol

13)Electronegativity increases from left to right

and decreased from top to bottom

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