PLEASE HELP I HAVE FEW MINUTES 20 POINTS! Reflecting on the Phenomenon

Where did the mass of the forest trees come from? What happens to that mass when the forest burns?

Why don't trees spontaneously catch on fire and burn all the time? Why don't fires stop immediately as soon as they start? Develop a model for what has to happen for a large fire to occur.

Both of these phenomena is due to the ignition temperature.

Explanation:

Since a twig's surface area is not much larger than its volume, it ignites quickly. By comparison, a tree's surface area is much smaller than its volume, so it needs more time to heat up before it ignites.

answer: mercury

explanation:

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

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