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3 years ago

Describe a procedure to separate a mixture of sugar, black pepper, and pebbles.

1 answer:

8 0

1) As pebbles are solid compounds, pour it into filter, it would extract every particle of pebbles.

2) Then, with the use of filter, we need to extract pepper from the compound.

3) Now, Add water 'cause we need to dissolve salt with it.

Hope this helps!

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1. Oxygen<br> full electron configuration

Arada [10]

Answer:

$1s^{2} 2s^{2} 2p^{4}$

Explanation:

Oxygen has eight eletrons and six valence electrons, giving it the electron configuration of $1s^{2} 2s^{2} 2p^{4}$ .

7 0

3 years ago

What is the necessary voltage to power the electrolysis of molten sodium chloride?

sammy [17]

4V is the necessary voltage to power the electrolysis of molten sodium chloride.

To create sodium metal and chlorine gas, molten (liquid) sodium chloride can be electrolyzed. A Down's cell is the name of the electrolytic cell utilised in the procedure. The liquid sodium ions in a Down's cell are converted to liquid sodium metal at the cathode. Liquid chlorine ions are oxidised to chlorine gas at the anode. Below is an illustration of the reactions and cell potentials:

oxidation: $2Cl^{-} (l)$ → $Cl_{2} (g)$ + $2e^{-}$ E°= -1.36V

reduction: $Na^{+} (l) + e^{-}$ → $Na (l)$ E°= -2.71V

overall : $2Na^{+} (l) + 2Cl^{-} (l)$ → $2Na(l) +Cl_{2} (g)$ E° $_{cell}$ = -4.07V

For this electrolysis to take place, the battery needs to supply more than 4 volts. The only means to obtain pure sodium metal is by this reaction, which also serves as a significant source of chlorine gas generation. Swimming pools and other surfaces are frequently cleaned and disinfected with chlorine gas.

Learn more about sodium chloride here;

brainly.com/question/9811771

#SPJ4

6 0

2 years ago

Why does group 18 in the periodic table not form ions?

alukav5142 [94]

Lets take a moment to list all the characteristics of the group 18 (also known as noble gases and/or group 8) elements:
- They have 8 valence electrons.
- Don't need ANY more electrons because their octet is full (stable).
- Are stable
- Not reactive
- Known as the noble gases

Now.. lets take some time to think about why elements want to form ions:

Elements form ions to either gain or lose valence electrons to the element they bond with. This helps them GAIN a full octet. What is a full octet, you may ask? An octet is when an element has all 8 valence electrons and is stable, making it nonreactive.

Why would an element with a full octet want to bond? It already has a full octet, it does not need to bond.

That, my fellow Brainly user, is why the noble gases do not need to bond.

I really do hope this helps! Enjoy, and good luck on the studies.

4 0

3 years ago

Choose a reasonable explanation to account for the differences. There may be more than one possible reason that makes sense, jus

Ugo [173]

Answer:

A. It is possible not all of the water was evaporated from the sand, causing the recovered mass to be higher

D. While drying the NaCl, the liquid boiled and some splattered out of the evaporating dish, causing the recovered mass to be higher.

Explanation:

Sand absorbs water and stores it. The sunlight causes the water to evaporate but sand can hold some of the water inside it. This results in increase in mass of the sand. The mass of sand before and after the water evaporation can be different.

6 0

3 years ago

The chemical properties of ca are most similar to the chemical properties of ?

EastWind [94]

<span>some elements would be Beryllium, Barium, Magnesium, and Strontium</span>

6 0

3 years ago