What is an extinction event

1 answer:

4 0

An extinction event is a widespread and rapid decrease in the biodiversity on Earth. Such an event is identified by a sharp change in the diversity and abundance of multicellular organisms. It occurs when the rate of extinction increases with respect to the rate of speciation. -Wikipedia

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Explain the meaning of the terms "saturated," "unsaturated," and "supersaturated"

dmitriy555 [2]

Saturated Solution: A solution with solute that dissolves until it is unable to dissolve anymore, leaving the undissolved substances at the bottom. Unsaturated Solution: A solution ( with less solute than the saturated solution )that completely dissolves, leaving no remaining substances. Supersaturated Solution.

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2 years ago

How is the periodic table helpful in determining the types of bonds an element will form?

BigorU [14]

1.)b
2.)true
3.)false
are the answer don't take me on my word

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3 years ago

Let’s assume that you put a balloon into the freezer. Initially,the balloon had 3.0liters of gas at a pressure of 400kPa and was

EastWind [94]

Here, we should use combined gas law which can be derived from combined gas law, “PV=nRT”. Rearranging, we can get PV/T=nR. Then we can set the two states in the problem together to get

P1V1/T1 = P2V2/T2

Then just plug in and solve algebraically.

Hope this helps

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3 years ago

Does water gain or release energy when evaporated into water vapor?

lawyer [7]

It receives heat energy.

7 0

3 years ago

Consider the following reaction at equilibrium. What effect will adding some C have on the system?CO2(g) + C(graphite) ↔ 2 CO(g)

sashaice [31]

Answer:

No effect will be observed since C is not included in the equilibrium expression.

Explanation:

Let's consider the following reaction.

CO₂(g) + C(graphite) ↔ 2 CO(g)

The equilibrium constant (Kc) is the product of the concentration of the products raised to their stoichiometric coefficients divided by the product of the concentration of the reactants raised to their stoichiometric coefficients.

Kc only includes gases and aqueous species (not liquids or solids).

$Kc=\frac{[CO]^{2}}{[CO_{2}]}$

As we can see, C is a solid and is not included in the equilibrium expression, so adding some C would have no effect on it.

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3 years ago