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Sophie [7]
3 years ago
9

A group of elements with similar properties, which usually falls into columns on the periodic table. A.period b.ductile c.atomis

d.family​
Chemistry
1 answer:
Sati [7]3 years ago
5 0
D. Family, The vertical columns on the periodic table are called groups or families because of their similar chemical behavior.
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an atom of magnesium has 12 protons and 12 electrons. if the atom loses 2 electrons, what will be the charge on the ion that for
goblinko [34]
It would have a positive two charge (+2).
12+(-12)=0
12+(-10)=2
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3 years ago
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a bird population only eats a certain type of plant. one year, flooding washes away most of these plants in an area. what will m
kvv77 [185]
A reduction of the bird population in that particular area.
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3 years ago
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What is the pOH of a solution of pH 3 acid? (Kw= 1.0 x 10-14)
miv72 [106K]

Answer:

pOH = 11

Explanation:

The pH is an unit of concentration widely used in chemistry to find the quality of a solution.

To solve this question we must, as first, find the [H+] using the pH:

[H+] = 10^-pH

[H+] = 10^-3

Now, using kw:

kw = 1.0x10-14 = [H+] [OH-]

1.0x10-14 = [10^-3] [OH-]

[OH-] = 1.0x10-11

pOH = -log [OH-]

<h3>pOH = 11</h3>
7 0
3 years ago
Given the two reactions H2S(aq)⇌HS−(aq)+H+(aq), K1 = 9.76×10−8, and HS−(aq)⇌S2−(aq)+H+(aq), K2 = 1.22×10−19, what is the equilib
timurjin [86]

Answer:

Kf  = 8.4 x 10²⁶

Explanation:

H₂S(aq) ⇌ HS⁻(aq) + H⁺(aq)

K1 = [HS⁻] [H⁺] / [H₂S]

K1 = 9.76×10−8

9.76×10−8 =  [HS⁻] [H⁺] / [H₂S]

HS⁻(aq) ⇌ S²⁻(aq) + H⁺(aq)

K2 = 1.22×10−19

K2 = [S²⁻] [H⁺] / [HS⁻]

S²⁻ (aq)  + 2H⁺(aq)  ⇌ H₂S(aq)

Kf = [H₂S] /[S²⁻] [H⁺]²

To obtain the value of Kf, the relationship between Kf, k1 and k2 have to be determined;

K1K2 = ( [HS⁻] [H⁺] / [H₂S]) * [S²⁻] [H⁺] / [HS⁻]

K1K2 = [H⁺]² [S²⁻] / [H₂S]

K1K2 = 1 / Kf

Kf = 1  / (K1K2)

Kf = 1 / (9.76×10⁻⁸ * 1.22×10⁻¹⁹)

Kf = 1 / (11.91 x 10-27)

Kf = 0.084 x 10²⁸

Kf  = 8.4 x 10²⁶

5 0
4 years ago
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Jacinta wrote the following passage about chemical changes.
Alex Ar [27]
She should add either the 3rd or fourth statement
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3 years ago
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