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Klio2033 [76]
3 years ago
8

Scientists have speculated that element 126 might have a moderate stability, allowing it to be synthesized and characterized. pr

edict what the condensed electron configuration of this element might be.
Chemistry
2 answers:
SIZIF [17.4K]3 years ago
5 0
The condensed electron configuration of this element might be is 8s^25g^6. The electronic configuration is a depiction of the distributions of different or various physical elements such as atoms, molecules, and also the electrons. The electronic configuration is said to be like a code that explains the relationships of electrons.
kirill115 [55]3 years ago
5 0

Answer:

5g2 6f2 7d1 8s2 8p1

Explanation:

The full electrons configuration for this element would be:

1s2 2s2 2p6   3s2 3p6 3d10   4s2 4p6 4d10 4f14   5s2 5p6 5d10 5f14 5g2    6s2 6p6 6d10 6f2    7s2 7p6 7d1   8s2 8p1

This configuration explains the electron orbit levels and the arrangement of all the electrons for that element. Each element has its own electron configuration. The configuration shown for element-126 is only a prediction, as the element is not naturally occurring on the planet.

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Calculate the molarity of a solution obtained dissolving 10.0 g of cobalt(Ⅱ) bromide tetrahydrate in enough water to make 450 mL
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Answer:

<em><u>The molarity of the CoBr2•4H2O solution is  7.64 × 10-2 M</u></em>

Explanation:

Cobalt (II) bromide tetrahydrate

• Cobalt - A transition metal with Roman numeral (II) → charge: +2 → Co2+

• Bromide - anion from group 7A → -1 charge → symbol: Br-

• Tetrahydrate- tetra- means 4 and hydrate is H2O

The chemical formula of the compound is: CoBr2•4H2O

We then need to determine the number of moles of CoBr2•4H2O since this is the only information missing for us to find molarity. Notice that the volume of the solution is already given.

We’re given the mass of CoBr2•4H2O. We can use the molar mass of CoBr2•4H2O4 to find the moles.

•The molar mass of CoBr2•4H2O is:

CoBr2•4H2O  

1 Co x 58.93 g/mol Co = 58.93 g/mol

2 Br x 79.90 g/mol Br = 159.80 g/mol

8 H  x 1.008 g/mol H = 8.064 g/mol

4 O  x 16.00 g/mol O = 64.00 g/mol

________________________________________

                           Sum = <u>290.79 g/ mo</u>

The moles of CoBr2•4H2O is:

= 10.0 g CoBr2•4H2O x  \frac{ 1 mol  CoBr_2 . 4H_2O}{290.79 g CoBr_2 .  4H_2O}

= <u>0.0344  mol CoBr2•4H</u>

We know that the volume of the solution is 450 mL.

We can now calculate for molarity:

Convert mL to L → 1 mL = 10-3 L

Formula:

Molarity (M)= Mole of solute / Liters of solution

= 0.0344  mol CoBr2•4H  / 450 mL x 1 ml / 10^ -3 L

= 0.0764

=  7.64 × 10-2 mol/L

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