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In a California study based on a 2003 random sample telephone survey, 37%-46% of gay men compared to 51%-62% of lesbians and 62% of heterosexuals were found to be engaged...
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A gas exerts a pressure of 2.0 atm, at 30°C, in a 10 L container. In what size container would the same amount of gas exert a pressure of 4.0 atm at 20° C?
Using the gas law: pV = nRT, and keeping the same number of moles of gas (n),we find the final volume V2:V2 = (T2/p2)*(p1*V1/T1) = (293 K/ 4.0 atm)*(2.0 atm...
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A sample of foul-smelling gas has a density of 0.650 g/L at 250C and 757 mmHg. What is the molecular weight of the gas?
757/513k×0.650= 18.0g/L
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A sample of nitrogen gas exerts a pressure of 9.80 atm at 32 °C. What would its temperature be (in °C) when its pressure is increased to 11.2 atm?
For answering this question you need to use the next law: PV = nRT V, R, n are constants P is pressure T is temperature From the first law: P1/T1...
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The EMF of the cell
Cd ( CdCl2. 2.1/2 H2O (saturated) AgCl (s) ( Ag
is found to be 0.6753 V at 250C and 0.6915 V at 00C. Calculate (G, (H and (S of the cell reaction at 250C.
Cell reaction is:Cd + 2 AgCl = CdCl2 + 2 AgEMF corresponds to ΔG:ΔG = -2*F*EMF = ΔH - T*ΔSAt 25 0C = 298 K we have the one equation:...
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The EMF of the cell
Cd | CdCl2. 2.1/2 H2O (saturated) AgCl (s) |Ag
is found to be 0.6753 V at 250C and 0.6915 V at 00C. Calculate (G, (H and (S of the cell reaction at 250C.
Cell reaction is:Cd + 2 AgCl = CdCl2 + 2 AgEMF corresponds to ΔG:ΔG = -2*F*EMF = ΔH - T*ΔSAt 25 0C = 298 K we have the one equation: -2*96500*0.6753...
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<ol><li>We are given the initial pressure of 1.5 atm and temperature of 25⁰C of the gas and asked for the pressure at a higher temperature of 450⁰C </li></ol>
Let's assume that the volume of gas remains unchanged.P1 = 1.5 atmT1 = 25⁰C = 298 KV1 = V2 = constantP2 = unknownT2 = 450⁰C = 723 KSolution:Since the volume...
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A mixture of four gases exerts a total pressure of 860mmHg. Gas A and B each exert 220mmHg. Gas C exerts 110mmHg. What pressure is exerted by gas D?
For this task we use the Dalton’s law which says that total pressure of mixture of gases equals to the sum of partial pressures of individual gases: Ptotal=PA+PB+PC+PD Therefore PD...
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Use Boyle's, Charles's, Gay-Lussac's Law to calculate the missing value of the following:
v1= 250 ml, t1=?, v2=400 ml, t2=298 Kelvin
T1/V1 = T2/V2 T1 = (V1·T2)/V2 T1 = (250ml·298K)/400ml = 186.25 K
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50cm3 of nitrogen gas combine with 150cm3 of hydrogen gas to form 100cm3 of ammonia. Are these experimental facts in keeping with Gay Lussacs law of combining volumes?
N2(g) + 3H2(g) = 2NH3(g)1 mole of nitrogen gas combines with 3 mols of hydrogen gas to form 2 mol of a ammonia gas.1 volume of nitrogen reacts with 3 volumes of...
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