The standard enthalpy of reaction, ∆H° at 25 C ° NH3(g) + HCl(g) → NH4Cl(s) is ‑175.9 kJ mol-1. Determine the value of ∆E°rxn for this reaction.

possibly, yes.

explanation:

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the answer is c. nacl

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally