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1. CH3CCCH2CHCH3 a triple bond between the 2nd (L to R ) 3rd carbons and a –CH3 group attached to the fifth carbon. full name of the compound.?

2-hexyne or hex-2-yne

1 Answers · Science & Mathematics · 04/11/2020

2. What is the number of moles of gas contained in a 3.0L vessel at 300K with a pressure of 1.50 atm? PV = nRT R = .0821 ?

PV = nRT, so n = PV/RT = (1.50)(3.0)/(0.0821)(300) = 0.18

1 Answers · Science & Mathematics · 13/11/2020

3. The standard free energy change associated with the dissolution of ammonium nitrate in water is –6.73 kJ at 298 K. NH4NO3(s) NH4NO3(aq)?

ΔG° = - R T ln(K) -6.73 = -(8.31 × 10⁻³) × 298 × ln(K) ln(K) = 2.72 K = e²˙⁷² Equilibrium constant for the reaction, K = 15 The answer: d. 15

1 Answers · Science & Mathematics · 11/04/2020

1. ln (k2/k1) = (Ea/ R ) (1/T1-1/T2) ln (k2/2.50X10^-2) = (8.10X10^4 ...

1 Answers · Science & Mathematics · 28/08/2020

5. Spell the name of an element that has a total of 5 electrons in its s and p (not d- or f-element) valence orbitals.?

N I T R O G E N or P H O S P H O R U S

1 Answers · Science & Mathematics · 03/11/2020

6. enthalpy of vapourisation?

ln (p2/p1) = DeltaHvap/ R (1/T1-1/T2) ln (21332/5866) = (Delta Hvap/8.314 J/molK) (1/288K - 1/313 K) Delta Hvap = 3.87X10^4 J/mol = 38.7 kJ/mol

1 Answers · Science & Mathematics · 25/06/2020

7. Activation Energy question?

Arrhenius equation: ln(k₁/k₂) = (Eₐ/ R ) [(1/T₂) - (1/T₁)] Hence, Eₐ = R ln(...

1 Answers · Science & Mathematics · 30/03/2020

Arrhenius gives us  ln(k2/k1)=Ea/ R ( 1/T1 - 1/T2) Ea/ R (1-T1 - 1/T2) = 262000...

1 Answers · Science & Mathematics · 13/02/2020

9. Activation energy?

... = 348 K: k₂ = 3k ln(k₁/k₂) = (Eₐ/ R ) [(1/T₂) - (1/T₁)] ln(1/3) = (Eₐ/8.314) [(1/348) - (1/318...

1 Answers · Science & Mathematics · 14/07/2020

10. Chem Problem: If an enclosure of 0.442 L has a partial pressure of O2 of 3.5×10−6 torr at 28 ∘C, what mass of magnesium will react?

... of moles using the ideal gas equation PV= moles * R *T P is pressure V is volume R is...

1 Answers · Science & Mathematics · 27/10/2020