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insens350 [35]
3 years ago
15

When chromium loses two electrons, its configuration changes to A. [Ar]4s13d5. B. [Ar]3d4. C. [Ar]4s13d4. D. [Ar]4s1.

Chemistry
1 answer:
belka [17]3 years ago
5 0

Chromium has the electron configuration [Ar]4s13d5 and exhibits oxidation numbers 2+, 3+, and 6+. When chromium loses two electrons, it forms the Cr2+ ion and has the configuration [Ar]3d4.

The Answer is B. [Ar]3d4

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Explanation:

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5 0
2 years ago
The molar mass of a compound is 92 g/mol. Analysis of a sample of the compound indicates that it contains 0.606g of N and 1.390g
Ghella [55]

Answer:

N2O4

Explanation:

To obtain the molecular formula of the compound, first, let us calculate the empirical formula for the compound. This is illustrated below:

N = 0.606g

O = 1.390g

Next, we divide the above by their molar masses

N = 0.606/14 = 0.0432

O = 1.390/16 = 0.0869

Next, we divide by the smallest

N = 0.0432/0.0432 = 1

O = 0.0869/0.0432 = 2

The empirical formula is NO2

The molecular formula is given by:

[NO2]n = 92

[14 + (16x2)]n = 92

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Divide both side by the coefficient of n i.e 46

n = 92/46

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The molecular formula = [NO2]n = [NO2]2 = N2O4

8 0
4 years ago
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