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BARSIC [14]
3 years ago
10

Which is a physical characteristic of a fish?

Chemistry
1 answer:
Nitella [24]3 years ago
3 0

Answer:

Gill's

Explanation:

Fish's have many characteristics that differ from humans, and one of them is the gills.

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How many grams of CaCO3 must be added to 235.0 g of water to make a 15.0% solution
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Considering the activity series given below for metals and nonmetals, which reaction will occur?
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3 years ago
The PH of a 0.1 M MCl (M is an unknown cation) was found to be 4.7. Write the net ionic equation for the hydrolysis of M and its
Serggg [28]

Answer:

6.25 X10^{-9} = Ka

Kb= \frac{10^{-14}}{6.25 X10^{-9}}= 1.6X10^{-6}

Explanation:

The ionic equation for the hydrolysis of the cation of the given salt will be:

M^{+} + H_{2}O ---> MOH + H^{+}

The expression for Ka will be:

Ka = \frac{[H^{+}][MOH]}{[M^{+}]}

As given that the concentration of the salt is 0.1 M and pH of solution = 4.7, we can determine the concentration of Hydrogen ions from the pH

pH = -log [H⁺]

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Ka = {2.5X10^{-5}X2.5X10^{-5}}{0.1} = 6.25 X10^{-9}

The relation between Ka an Kb is

KaXKb =10⁻¹⁴

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3 years ago
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An orbital is a function that describes the probability of finding the electron with certain energy at certain distance from the nucleus therefore, it is defined by the number of electrons.
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