Chemistry, 26.09.2019 17:10 yrkfred1440

The fda recommends that women who are pregnant avoid eating more than three 6.00 oz servings of bluefish per month because of the relatively high mercury levels in that type of fish. if bluefish contains 0.323 ppm of mercury (that is, 0.323 oz of mercury per 1×106 oz of fish), how many ounces of mercury would a pregnant woman consume in a month if she ate the maximum recommended amount of bluefish?

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Answer from: dpranavesh446

$5.814\times 10^{-6}$

Explanation:

The maximum recommended amount of the bluefish = three 6.00 oz servings in a moth.

It means, 18 oz of bluefish per month is maximum recommended.

Also, given that: bluefish contains 0.323 ppm of mercury which means that:

$1\times 10^6\ oz$ oz of fishes contains 0.323 oz of mercury

Thus,

1 oz of fish contains $\frac {0.323}{1\times 10^6}$ oz of mercury

Also,

18 oz of fish contains $\frac {0.323}{1\times 10^6}\times 18$ oz of mercury

Mercury levels in maximum recommended amount of bluefish = $5.814\times 10^{-6}$

Answer from: Quest

Tropical easterlies is mostly likely your answer correct me if i’m wrong

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

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