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3 years ago

FOR 50 POINTS & A BRAINIST*

Chemistry

1 answer:

Reika [66]3 years ago

5 0

Answer:

1. A

2. D

3. D

4. B

Explanation:

Sulfer is in the 3rd period of the periodic table meaning that 2 periods came before it hence the 2 electron shells and it is in the 6th group hence the 6 valence electrons.

Using this logic we know that the element in the 5th period and the 7th group which would be Iodine

We also know that the element in the 4th period and 8th group is Krypton

The Lewis dot model is more commonly used to show chemical reactions, I haven't heard of the addition or subtraction models before so there's a chance that it may only be part of your curriculum, or they are answers made up for your multiple choice.

Hope this helps!!!

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Need help urgently!!

VLD [36.1K]

Answer:

it's-D...........................

6 0

3 years ago

Given a solution with a hydroxide ion concentration, oh=3.73×10^-5,what is the ph

Stells [14]

Answer:

pH = 9.73

Explanation:

pOH is the negative logarithm of the molar concentration of hydroxide ions and pH is the negative logarithm of the concentration of hydronium ions.

The mathematical expression to determine pOH is:

$pOH=-\log [OH^-]$

Where [OH⁻] means the molar concentration of hydroxide ions.

Substituting:

$pOH=-\log {(3.73\times 10^{-5})$

$pOH=4.43$

pH and pOH are related by the equation:

$pH+pOH=14$

From which:

$pH=14-pOH\\\\pH=14 - 4.43\\\\pH=9.57\leftarrow answer$

8 0

3 years ago

What element does HgNo

melisa1 [442]

Answer:

Mercury is a chemical element with symbol Hg and atomic number 80. Classified as a transition metal, Mercury is a liquid at room temperature.

...

Explanation:

3 0

2 years ago

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Your dad is working on creating a brick border for the lake in your backyard each brick has a mass of 100 g and a volume of 20 c

wel

Answer:

5000kg/m³

Explanation:

density=mass/volume

d=m/v

d=100/20

=5g/cm³

g/cm³*1000=kg/m³

5g/m³*1000=5000kg/m³

4 0

3 years ago

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Can someone help out pls

Troyanec [42]

Answer:

1. Acids

2. Its molecular arrangement

3. Very acidic

4. Unsaturated

5. Apple juice

Explanation:

1. Acids have pH less than 7

2. Water molecules have a polar arrangement of the oxygen and hydrogen atoms—one side (hydrogen) has a positive electrical charge and the other side (oxygen) had a negative charge.3. Very acidic

4. Unsaturated solutions are solutions in which the amount of dissolved solute is less than the saturation point of the solvent (at that specific temperature gradient).

5. The lower the pH, the more hydrogen molecules.

4 0

3 years ago

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