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ira [324]
4 years ago
12

Calculate the average atomic mass of boron (B), which has two isotopes: B-10 with 19.9% natural abundance, and B-11 with 80.1% a

bundance. Average atomic mass of boron = (f1)(M1) + (f2)(M2) Question 13 options: 12.1 amu 10.8 amu 9.2 amu 3.3 amu
Chemistry
1 answer:
lina2011 [118]4 years ago
6 0

Answer:

The average atomic mass of boron is found to be  

10.80

Explanation:

also u answered it urself

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Which ion is not an oxyanion? NO− SO4 2− CN− CO3 2−
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Answer:

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Explanation:

Oxyanion:

Oxyanion is the anion that have oxygen atom.

General formula:

The general formula for oxyanion is AₓOₓ⁻².

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z,x, = integers

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4 years ago
What volume of methanol should be used to make 1.25 L of a 21.0% by volume solution
Marat540 [252]

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Explanation:

Given that:

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To make 21 % solution by volume of a substance it means that 21 L of the substance is present in 100 L of the solution which is made upto 100 L by adding the solvent.

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vampirchik [111]

Answer:

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