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4 years ago

Why do all the elements in Group 16 share similar properties?

Chemistry

1 answer:

geniusboy [140]4 years ago

5 0

D. They all have the same number of valence electrons.

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Why is soaking necessary for seed germination

lora16 [44]

Answer:

Explanation:

well it needs water like us to stay alive

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3 years ago

A certain weak acid, HA, has a Ka value of 2.6×10−7. Calculate the percent ionization of HA in a 0.10 M solution.

Andrej [43]

Answer:

The percent ionization is 0,16%

Explanation:

The percent ionization is defined as the number of ions that exist in a substance.

$PI=\frac{[A-]}{[HA]} x100$

First, we find the [A-] using the ka equation

HA ⇄ $H^{+} + A^{-}$

[H+] = [A-]

$Ka=\frac{[H+][A-]}{[HA]}\\ \\$

since the ionization constant is very small we can assume that the final concentration of [HA] is the same

$Ka=\frac{[H+]^{2} }{[HA]} \\\\$

$[H+]=\sqrt[2]{Ka.[HA]} \\\\$

$[H+] =\sqrt{(2,610^{-7} )(0,1)} = 1,61210^{-4}$

Now we calculate the percent ionization using these values

$PI=\frac{1,61210^{-4} }{0,1} X100$

PI=0,16%

4 0

4 years ago

What property of water allows the water to cover the astronauts hand?

Arisa [49]

Answer:

The tendency for water molecules to stick together causes it to causes spheres in space. ... Magnetic-like molecules on water's surface cause the surface to behave like an elastic skin. Each molecule is pulled with equal tension by its neighbors.J

Explanation:

7 0

4 years ago

Which equation represents the reaction of acetic (ethanoic) acid with water?

xz_007 [3.2K]

Chemical equation:

CH₃COOH + H₂O = CH₃COO⁻ + H₃O⁺

hope this helps!

5 0

3 years ago

What is the answer?

nevsk [136]

i believe that it is b

8 0

3 years ago