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s344n2d4d5 [400]
3 years ago
12

Thực trạng tồn dư nitrat trên rau và an toàn thực phẩm

Chemistry
1 answer:
hram777 [196]3 years ago
4 0

You are a botereleg

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Studentka2010 [4]

Answer:

what

Explanation:

4 0
3 years ago
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Classify each of these reactions. Ba(ClO3)2(s)⟶BaCl2(s) 3O2(g)Ba(ClO3)2(s)⟶BaCl2(s) 3O2(g) acid–base neutralization precipitatio
MrRissso [65]

<u>Answer:</u>

1- Ba(ClO3)2(s) ----> BaCl2(s) +3O2(g) -Redox

2- 2NaCl(aq) +K2S(aq) ----> Na2S(aq) + 2KCl(aq)  - None of the above

3- CaO(s) + CO2(g) ------> CaCO3(s)  -None of the above

4- KOH(aq)+ AgNO3(aq) -----> KNO3(aq) + AgOH(s)  - Precipitation

5- Ba(OH)2(aq) + 2HNO2(aq) -----> Ba(NO2)2(aq) +2H2O(l) -Neutralization.

<u>Explanation;</u>

1) Redox, because it involves bith reduction and oxidation

2) I suppose would be "none of the above" for this chemical reaction, from the choices given.

3) It is a synthesis reaction, thus the correct answer should be "none of the above" from the asker's choices.

4) It is a precipitation reaction, also called double decomposition reaction where two soluble salts react to form an insoluble salt and a soluble salt.  

5) It is acid-base neutralization, as such reactions form both a salt and water.

6 0
3 years ago
The ability of a substance to conduct electricity is called_______​
trapecia [35]

Answer:

Electrical conductivity

Explanation:

Electrical conductivity - A material's ability to conduct electricity

5 0
3 years ago
The compounds below are to be separated by extraction. A student dissolves the compounds in either and then transfers the soluti
gulaghasi [49]

Answer:

1) Separate the aqueous layer from the organic layer using the separation funnel.  

2) Treat the aqueous layer to obtain compound A.

3) Distilated the organic layer to obtain compound B.

Explanation:

When <u>NaOH is added</u> to the mixture the acid groups will react to produce a salt and increases the polarity of the compounds due to the net charges generated. (Figure 1).

Therefore, the salt produced by compound A will move to the <u>aqueosus layer</u>. Compound B dont react due to the lack of <u>acid groups</u>. So, this molecule will stay in the <u>organic layer</u>.

When the aqueous layer is separated from the organic layer using the separation funnel we will have a <u>separation</u>. The compound will remain in the aqueous layer and compound b will remain in the organic layer.

Then we aqueous layer can be <u>treated with HCl</u> in order to obtain the initial A molecule, in other words: Undo the ionic form of compound A.

The organic layer can be removed by <u>distillation</u> in order to obtain the pure form of compound B.

3 0
3 years ago
What type of weather will maryland expect in a day or so?
ycow [4]

Answer:

clouds???

Explanation:

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