<span>The symbol on a line that indicates a cold front on a map is a triangle. The point of the triangle will indicate the direction of movement of the cold front.</span>
The electron configuration of the element in period 3, group 6A is [Ne]3s-2 3p-4.
Answer:
ΔGreaction < 0
ΔSuniverse > 0
ΔHreaction < 0
Explanation:
A spontaneous process is one which can proceed without additional input of energy releasing free energy in the process and then moves to a lower more stable thermodynamical state.
For an isolated system, a spontaneous process proceeds with an increase in entropy.
The conditions for a spontaneous process at constant temperature and pressure, can be determined using the change in Gibbs free energy, which is given by: ∆G = ∆H - T∆S
Where ∆G is change in free energy; ∆H is change in enthalpy or Heat content; ∆S is change in entropy, T is temperature.
For a process to be spontaneous, the following conditions are necessary:
1. ∆G < 0; must be negative
2. ∆S > 0; there must be an increase in entropy
3. ∆H < 0; enthalpy change must be negative such that heat is lost to the surroundings
The above conditions ensures that ∆G is negative and the process is spontaneous.
Answer:
NH₄⁺: 0.340M
NH₃: 0.277M
Explanation:
A buffer is the mixture of a strong acid with its conjugate base.
For the buffer of NH₃ / NH₄⁺, moles of each one are:
NH₄⁺: 0.287L × (0.310mol / L) = 0.0890 moles
NH₃: 0.287L × (0.310mol / L) = 0.0890 moles
The reaction of HNO₃ with NH₃ is:
HNO₃ + NH₃ → NH₄⁺ + NO₃⁻
Moles of 1.50mL of 6.00M HNO₃ are:
1.50x10⁻³L × (6.00mol / L) = 9x10⁻³ moles of HNO₃. These moles are moles produced of NO₃⁻ and consumed of NH₃. Thus moles after reaction are:
NH₄⁺: 0.0890 moles + 0.0090 moles = <em>0.0980moles</em>
NH₃: 0.0890 moles + 0.0090 moles = <em>0.0800moles</em>
As total volume is 287.00mL + 1.50mL = 288.50mL (0.28850L), concentrations are:
NH₄⁺: 0.0980moles / 0.28850L = 0.340M
NH₃: 0.0800moles / 0.28850L = 0.277M
,
molecules.