What is the Noble gas notation for mercury (Hg)?.

1 answer:

4 0

The noble gas notation of an element includes a noble gas as a condensed way to describe the electronic configuration of an element. IN this case, the nearest noble gas is xenon with an atomic number of 54. Hg's atomic number is 80 so we need 26 more. In this case, after [Xe], the configuration starts with 6s². Hence to complete the configuration the answer is [Xe] 6s2 4f14 5d10

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Arrange the following solids in order of decreasing solubility, CaF2, K sp=4.0 × 10-11; Ag2CO3, K sp=8.1 × 10-12; Ba3(PO4)2, K s

viva [34]

Answer:

CaF2 > Ag2CO3 > Ag3(PO4)2 > Ba3(PO4)2

Explanation:

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When two or more substances combine, but each keeps its own properties, what is the new combination called A) Element B) Mixture

vodka [1.7K]

Hi.
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How many milliliters of a 25% (m/v) NaOH solution would contain 75 g of NaOH?

Luda [366]

Answer:

E 3.0 x 10² mL.

Explanation:

Hello there!

In this case, according to the formula for the calculation of the mass-volume percent:

$\% m/V=\frac{m_{solute}}{V_{solution}}*100\%$

Whereas it is necessary to know the mass of the solute and the volume of the solution. Thus, given the mass of NaOH as the solute, the volume of the solution would be:

$V_{solution}=\frac{m_{solute}}{\% m/V}*100\%$

Then, by plugging in we obtain:

$V_{solution}=\frac{75g}{25\%}*100\%\\\\V_{solution}=3.0x10^2mL$

Thus, the answer is E 3.0 x 10² mL.

Best regards!

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