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UkoKoshka [18]
4 years ago
8

Which reaction will occur?

Chemistry
2 answers:
xz_007 [3.2K]4 years ago
7 0
Only the second 2Fe + Al2O3 = 2Al + Fe2O3. In the first reaction iodide can not replace bromide from the salt. In the third reaction lead can not replace more active zinc metal from the salt.
kati45 [8]4 years ago
3 0

Answer:  2AgNO3+Ni\rightarrow Ni(NO_3)_2+2Ag

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution.

1) 2NaBr+I_2\rightarrow 2NaI+Br_2

As iodine is less reactive than bromine, it will not be able to displace bromine from its salt solution, hence no reaction will occur.

2)2Fe+Al_2O_3\rightarrow 2Al+Fe_2O_3

As iron lies lower in reactivity series, it is less reactive than Aluminium. It will not be able to displace aluminium from its salt and hence no reaction occur.

3) 2AgNO3+Ni\rightarrow Ni(NO_3)_2+2Ag

As nickel lies above in reactivity series, it is more reactive than silver. It will be able to displace silver from its salt and hence reaction will occur.

4) Pb+Zn(C_2H_3O_2)_2\rightarrow Zn+Pb(C_2H_3O_2)_2

As lead lies lower in reactivity series, it is less reactive than zinc. It will not be able to displace zinc from its salt and hence no reaction occur.

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11
Bess [88]

Answer:

Explanation:

<u>Manganese (VII) ion (an anion) has the formula MnO₄⁻</u>. A polyatomic ion is an ion that is made up of more than one atom. For example, MnO₄⁻ and NH₄⁺. Since the ion provided in the question is an anion, the polyatomic ion that would react with it will have to be a cation (positively charged).

<u>The polyatomic cation that will react with MnO₄⁻ to form a neutral compound is NH₄⁺ (ammonium ion) to form NH₄MnO₄ (Ammonium permanganate).</u>

6 0
3 years ago
As the temperature of one of the four liquids increases, the vapor pressure will
s2008m [1.1K]

Answer:

a) increase exponentially.

Explanation:

The vapor pressure is depend only on temperature.

The vapor pressure of liquid does not depend upon amount of liquid. For example whether the liquid is 50 g or 30 g its vapor pressure will remain same according to the temperature.

The temperature and vapor pressure have exponential relationship. As the temperature of liquid increases its vapor pressure also goes to increase. When the temperature of liquid goes to decrease its vapor pressure also decreases.

The change in vapor pressure of substance when temperature changes is given as,

ln P₂/P₁ = ΔH(va)/R (1/T₁ - 1/T₂)

7 0
3 years ago
What is the name of the salt with the structure K2S
gavmur [86]
Potassium sulphide :)
6 0
3 years ago
The limestone used in building the Egyptian pyramids was used because it is _____________
kvasek [131]

Answer:

hard and brittle

hope this helps you ☺️☺️

good night take care sweet dream

3 0
3 years ago
Read 2 more answers
Elements that belong to the same period/row!!
-BARSIC- [3]

Answer:

Each row is called a period. Each column is called a group or family.

Explanation:

7 0
3 years ago
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