Mutations are more important to the evolution of a species because

1 answer:

8 0

Answer: Mutations are important to the evolution of a species because is creates new DNA for a certain gene, creating a new allele.

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It depends what other values you have. Can you give more info? If they give density then you can solve for m.

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Consider the heating curve. In which region are most particles moving the fastest?

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The particles are moving fastest in Region D) 5.

As temperature increases, so does the average kinetic energy (speed) of the molecules.

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Explain the metallic and non metallic behavior of an element based on its position in the periodic table

mash [69]

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Metallic character refers to the level of reactivity of a metal. Non-metallic character relates to the tendency to accept electrons during chemical reactions. Metallic tendency increases going down a group. Non-metallic tendency increases going from left to right across the periodic table.

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What is the pH of a 1.0 L buffer made with 0.300 mol of HF (Ka = 6.8 × 10⁻⁴) and 0.200 mol of NaF to which 0.150 mol of HCl were

irinina [24]

Answer:

pH = 2.21

Explanation:

Hello there!

In this case, according to the reaction between NaF and HCl as the latter is added to the buffer:

$NaF+HCl\rightarrow NaCl+HF$

It is possible for us to see how more HF is formed as HCl is added and therefore, the capacity of this HF/NaF-buffer is diminished as it turns acid. Therefore, it turns out feasible for us to calculate the consumed moles of NaF and the produced moles of HF due to the change in moles induced by HCl:

$n_{HF}^{new}=0.300mol+0.150mol=0.450mol\\\\n_{NaF}^{new}=0.200mol-0.150mol=0.050mol$