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Sedaia [141]
3 years ago
14

Which solution is an example of an electrolyte A.)Methanol in water B.)Potassium iodide in water C.)Pentane in octane D.)Sucrose

in water
Chemistry
1 answer:
zhannawk [14.2K]3 years ago
4 0

Answer:

The correct answer is B.)Potassium iodide in water

Explanation:

An electrolyte is a compound that can dissociate into ions when is dissolved in a solvent. The resulting solution has the ability to conduct the electricity because there are electrical charges (ions) in the solvent. The most common electrolytes are soluble salts.

From the options, methanol (A), pentane (C) and sucrose (D) are organic compounds that cannot be dissociated into ions in the solvents in which are soluble. The only correct option is (B), because potassium iodide (KI) is a soluble salt that disociates into ions (K⁺ and I⁻) when is dissolved in water:

KI → K⁺ + I⁻

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1 year ago
The atomic weight of Ga is 69.72 amu. There are only two naturally occurring isotopes of gallium:
irga5000 [103]

Answer:

71 Ga has a naturally abundance of 36%

Explanation:

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

Percentage 69 Ga> Percentage 71 Ga

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

⇒Percentage of 71 Ga = X %

⇒Percentage of 69 Ga = 100 % - X %

The mass balance equation will be:

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

6972 = 71x + 6900 -69x

72 = 2x

x = 36 %

71 Ga has a naturally abundance of 36%

69 Ga has a naturally abundance of 64%

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