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Alekssandra [29.7K]
3 years ago
15

What ion will be formed by the selenium atom shown below when it has a stable set of valence electrons?

Chemistry
1 answer:
irina1246 [14]3 years ago
6 0
What ion will be formed by the selenium atom shown below when it has a stable set of valence electrons?Selenium atom

D. Se2-


Which of the following is the best description of how electrons are transferred in an ionic bond?

A. A metal atom loses electrons and a nonmetal atom gains electrons.

A user is constructing an ionic bond between beryllium and chlorine and has reached the stage below. What should the user do next?
Beryllium and chlorine

A. Transfer an electron from the beryllium atom to the chlorine atom.


Zinc phosphide, Zn3P2, is often used as a rat poison. Phosphorus has 5 valence electrons. How many valence electrons does each zinc atom lose?

B. 2

Lithium nitride has the chemical formula Li3N. Rubidium is in the same chemical family as lithium. What is the formula of rubidium nitride?

C. Rb3N

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You notice that the water in your friend's swimming pool is cloudy and that the pool walls are discolored at the water line. A q
Flauer [41]

Answer:

6,78 mL of 12,0 wt% H₂SO₄

Explanation:

The equilibrium in water is:

H₂O (l) ⇄ H⁺ (aq) + OH⁻ (aq)

The initial concentration of [H⁺] is 10⁻⁸ M and final desired concentration is [H⁺] = 10^{-7,20}, thus,

Thus, you need to add:

[H⁺] = 10^{-7,2} -10^{-8,0} = 5,31x10⁻⁸ M

The total volume of the pool is:

9,00 m × 15,0 m ×2,50 m = 337,5 m³ ≡ 337500 L

Thus, moles of H⁺ you need to add are:

5,31x10⁻⁸ M × 337500 L = 1,792x10⁻² moles of H⁺

These moles comes from

H₂SO₄ → 2H⁺ +SO₄²⁻

Thus:

1,792x10⁻² moles of H⁺ × \frac{1H_{2}SO_4 mol}{2H^{+} mol} = 8,96x10⁻³ moles of H₂SO₄

These moles comes from:

8,96x10⁻³ moles of H₂SO₄ × \frac{98,1 g}{1 mol} × \frac{100 gSolution}{12 gH_{2}SO_4 } × \frac{1 mL}{1,080 g}  =

6,78 mL of 12,0wt% H₂SO₄

I hope it helps!

8 0
3 years ago
Is The atoms of the elements have different masses but the same volume true?
stepladder [879]
Yes, the atoms of the elements do have different masses but the same volume
5 0
3 years ago
You are presented with a mystery as part of your practical experiment. You have a solution of Pb(NO3)2
shusha [124]
Ho123 right I’m sorry of I’m wrong
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2 years ago
How many moles are 8.8 grams of CO2?
Lemur [1.5K]
The answer is .2grams
8 0
3 years ago
Which of the following accurately describes a charactic of fungi
Black_prince [1.1K]
What are your options?
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