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denpristay [2]
3 years ago
10

How many valence electrons does oxygen have? a. 2 c. 6

Chemistry
1 answer:
Marina86 [1]3 years ago
6 0
Oxygen has 6 valence electrons
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Explain briefly how you would obtain crystals of sodium chloride from a mixture of sodium chloride ,lead[ii]oxide and iron filin
Arisa [49]

Answer:

See explanation

Explanation:

All the substances in the mixture; sodium chloride ,lead II oxide and iron filings are solids.

The first step is to use a magnet to separate the iron fillings which is a magnetizable material.

The remaining part of the mixture is now dissolved in water. Lead II oxide is insoluble in water while sodium chloride is very soluble in water hence a filtrate and a residue are obtained.

The residue is lead II oxide which can be dried to recover the solid. The filtrate contains sodium chloride which is recovered by evaporating the solution to dryness.

6 0
2 years ago
Which is classified as an inner transition element
Serhud [2]
They include elements 57-71 (lanthanides) and 89-103 (actinides)
7 0
3 years ago
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What is produced during the replacement reaction of ba(no3)2 and na2so4? 2bana 2no3so4 2nano3 baso4 nano3 baso4 bana2 (no3)2so4
Cloud [144]

2NaNO3(aq) + BaSO4 = Ba(NO3)2(aq) + Na2SO4(aq) (s)

Procedures involved:

The cations or anions may transfer positions in this twofold replacement/displacement reaction, which results in AB + CD AD + CB. In such a reaction, water, an insoluble gas, or an insoluble solid must be one of the byproducts (precipitate). The reaction in question has the following molecular equation:

2NaNO3(aq) + BaSO4 = Ba(NO3)2(aq) + Na2SO4(aq) (s)

Double displacement:

When two atoms or groups of atoms swap positions, a double displacement reaction occurs, creating new compounds. Typically, aqueous solutions are where it happens.

Na2SO4 + BaCl2 BaSO4 + 2NaCl is an example of a double displacement reaction.

To learn more about double displacement refer :brainly.com/question/23918356

#SPJ4

8 0
1 year ago
How do particles of gas create pressure
Fantom [35]

Answer:

Gas pressure is caused when the gas particles hit the walls of their container. The more often the particles hit the walls, and the faster they are moving when they do this, the higher the pressure. This is why the pressure in a tyre or balloon goes up when more air is pumped in

Explanation:

5 0
3 years ago
When interviewed, Mr. Harrison was discussing barometric pressure and the low-pressure system moving in that may cause a change
Zarrin [17]

A meteorologist?? I could be totally wrong though! :)


6 0
2 years ago
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