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NemiM [27]
3 years ago
14

Why do polar substances dissolve in water?

Chemistry
2 answers:
SIZIF [17.4K]3 years ago
8 0

Polar molecules have " dipole dipole" force of attraction between the molecules consisting of partially positive ion and partially negetive ion.

Water is the best example of polar molecule, having strong "hydrogen bonding" between the atoms of Oxygen (-ve) and Hydrogen(+ve).

When any polar substance dissolved in water, it break down into +ve and -ve ions.

Because of the dipole dipole attraction polar molecules are soluble in water.

77julia77 [94]3 years ago
7 0

water molecules are attracted to polar molecules and surround them.
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Step 1: Given data

Gallium has 2 naturally occurring isotopes: this means the abundance of the 2 isotopes together is 100 %. The atomic weight of Ga is 69.72 amu. This is the average of all the isotopes.

Since the average mass of 69.72 is closer to the mass of 69 Ga, this means 69 Ga will be more present than 71 Ga

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<u>Step 2:</u> Calculate the abundance %

⇒Percentage of 71 Ga = X %

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The mass balance equation will be:

100*69.72 = x * 71 + (100 - x)*69

6972 = 71x + 6900 -69x

72 = 2x

x = 36 %

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69 Ga has a naturally abundance of 64%

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