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Ugo [173]
3 years ago
8

Josie see's lightning off in the distance. A few seconds later she hears thunder. What can Josie conclude?

Chemistry
1 answer:
ycow [4]3 years ago
4 0
The answer is b) light waves travel faster than sound waves. 
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At what temperature is the following reaction at equilibrium? 2Na, O, + 2H,0 + 4NaOH + O, AH° = -109 kJ, ASO = -133.2 J/K
natali 33 [55]

Answer:

Temperature = 818 K

Explanation:

The given reaction is:

2Na2O2 + H2O \rightarrow 4NaOH + O2

The change in enthalpy is: ΔH°= -109 kJ

The change in entropy is : ΔS° = -133.2 J/k = -0.1332 kJ/K

Based on the Gibbs-Helmholtz equation the standard free energy change is given as:

\Delta G^{0}=\Delta H^{0}-T\Delta S^{0}

At equilibrium ΔG° = 0. therefore:

\Delta H^{0} = T\Delta S^{0}

T=\frac{\Delta H^{0}}{\Delta S^{0}}=\frac{-109}{-0.1332}=818 K

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3 years ago
When a runner participates in a marathon, they travel a distance of 26.2 miles. How many kilometers is
jolli1 [7]

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Around 42.2 Km

Explanation:

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Describe the day of June 21 at the North Pole in terms of daylight and darkness <br> ( science )
frosja888 [35]
On June 21, as seen from the North pole ...

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What describes a mixture
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a mixture is a material made up of two or more different substances which are physically combined.

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