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rewona [7]
3 years ago
13

What is the chemical formula for the binary compound composed of al3+ and o2- ions?

Chemistry
1 answer:
Mars2501 [29]3 years ago
8 0
Al^{3+}_{2} O^{2-}_{3}

The charge of the whole compound =0.
+3*2 -2*3=0
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43.2 + 50.0 + 16.0= answer in correct amount of significant figures
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Answer : The correct answer is 109.

Explanation :

Significant figure : It is defined as the each digits of a number have meaning or contribute to the value of the number.

The addition of given digits is,

43.2 + 50.0 + 16.0 = 109.2

As per the question, the given digits has 3 significant figures. But the answer after addition is 109.2 has 4 significant figures.

The addition rule of significant rule is the least precise number of significant figure in any number of the problem determines the number of significant figures in the answer.

Therefore, from the addition rule, the correct answer is 109.

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