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Alexxx [7]
3 years ago
8

The ion [Co(NH3)6]2+

Chemistry
1 answer:
Romashka-Z-Leto [24]3 years ago
3 0

Explanation:

The answer would be  B.

As paramagnetic with 3 unpaired electrons. Since there are 6 ligands around the Co+2 ion it isoctahedral and these ligands are neutral. This makes the overall charge on the complex +2 and therefore comes from the configuration for Co+2 which is [Ar] 3d7. Since it is in high spin you must fill all the orbitals with at least one electron and then pair up any that remain. If you do this, 3 unpaired electrons remain. Para magnetism occurs in substances with unpaired electrons.

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Answer:

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5 0
3 years ago
What is the mass of arsenic that is contained in a 50.0 g sample if the concentration is 5 ppm?
faltersainse [42]

<u>Answer:</u> The mass of arsenic found in the sample is 0.25 mg

<u>Explanation:</u>

ppm is the amount of solute (in milligrams) present in kilogram of a solvent. It is also known as parts-per million.

To calculate the ppm of oxygen in sea water, we use the equation:

\text{ppm}=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 10^6

Both the masses are in grams.

We are given:

Concentration of arsenic = 5 ppm

Mass of sample = 50 g

Putting values in above equation, we get:

5=\frac{\text{Mass of arsenic}}{50g}\times 10^6\\\\\text{Mass of arsenic}=\frac{5\times 50}{10^6}=0.00025g=0.25mg

<u>Conversion factor used:</u>  1 g = 1000 mg

Hence, the mass of arsenic found in the sample is 0.25 mg

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3 years ago
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Explanation:

hope it helps

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