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3 years ago

HELP ME please i need help with this

Chemistry

1 answer:

nadezda [96]3 years ago

7 0

4)
a) Natural selection will work negatively against rabbits that only eat berries as the drought is preventing berries from growing. It wont have any negative impact on rabbits that only eat grass as the grass is still surviving.

b) The statement ‘population has variations’ is backed up by the fact that the rabbits eat different things. They aren’t all the same. The statement ‘some variations are favorable’ is backed up by the fact that the rabbits that only eat grass are able to survive the drought. Their variation in eating grass instead of berries let’s them live. The statement ‘a population will change over time’ is backed up by the fact that the rabbits that only eat berries will die out. This will not only change the size of the population but going forward will create a population that has more rabbits that eat only grass on account of natural selection.

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blagie [28]

Answer:

The answer is

<h3> $Ka = 2.29 \times {10}^{ - 14} moldm^{ - 3}$ </h3>

Explanation:

The Ka of an acid when given the pH and concentration can be found by

where

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From the question

pH = 5.82

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Substitute the values into the above formula and solve for Ka

We have

Multiply through by - 2

Find antilog of both sides

We have the final answer as

<h3> $Ka = 2.29 \times {10}^{ - 14} moldm^{ - 3}$ </h3>

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