Match the era on the left with its characteristic on the right. Precambrian
When Earth formed
Mesozoic
The age of dinosaurs
Paleozoic
When most of our
limestone and coal
formed
Cenozoic
The era of humans

The correct match is -

Precambrian - When Earth formed

Mesozoic - The age of dinosaurs

Paleozoic - When most of our limestone and coal formed

Cenozoic - The era of humans

Explanation:

Different era or age of geological period is known for a specific event or characteristic of the particular geological era o period. The given geological periods are known for the following events:

1. Precambrian era is the earliest time of earth history and is known as the time when the earth is formed.

2. Mesozoic era is known for the time period that is dominated by the dinosaurs and all others animals were comparatively less.

3. Paleozoic is the era that is known for the most of lime-stones and coal formed.

4. Cenozoic era is known for the bloom or evolution and increase of mammals including humans during Holocene.

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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