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ira [324]
3 years ago
9

Zinc is more active than cobalt and iron but less active than aluminum. Cobalt is more active than nickel but less active than i

ron. Which of the following correctly lists the elements in order of increasing activity?
a) Zn < Al < Co < Ni < Feb) Co < Ni < Fe < Zn < Alc) Fe < Ni < Co < Al < Znd) Ni < Co < Fe < Zn < Ale) Ni < Fe < Co < Zn < Al
Chemistry
1 answer:
ziro4ka [17]3 years ago
8 0

Answer:

d) Ni < Co < Fe < Zn < Al

Explanation:

electronegativity of Aluminium  1.6

electronegativity of Zinc  1.7

electronegativity of iron  1. 83

electronegativity of Cobalt  1.88

electronegativity of Nickel  1.91

As the electronegativity of aluminium is lower as compared to other, so it will have high tendency to easily lose electron and that is why Aluminium is more reactive than the other mentioned

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HNO3 + H2O &gt; H3O(aq) + NO3-(aq)
Kruka [31]
What is the question and are there answers to go with it
8 0
3 years ago
The electrophilic bromination or chlorination of benzene requires ______ along with the halogen.
Oksanka [162]

The electrophilic bromination or chlorination of benzene requires Lewis acid along with the halogen.

<h3>What is bromination of benzene?</h3>

The bromination or chlorination of benzene is an example of an electrophilic aromatic substitution reaction.

During the reaction, the bromine forms a sigma bond to the benzene ring, yielding an intermediate. Subsequently a  a proton is removed from the intermediate to form a substituted benzene ring.

This reaction is achieved with the help of Lewis acid as catalysts.

Thus, the electrophilic bromination or chlorination of benzene requires Lewis acid along with the halogen.

Learn more about bromination of benzene here: brainly.com/question/26428023

8 0
2 years ago
A titration of 0.1 M NaOH into 1.2 L of HCl was stopped once the pH reached 7 (at 25C). If 0.4 L of NaOH needed to be added to a
MArishka [77]

Answer:

0.033 M

Explanation:

Let's consider the neutralization reaction between NaOH and HCl.

NaOH + HCl → NaCl + H₂O

0.4 L of 0.1 M NaOH were used. The reacting moles of NaOH are:

0.4 L × 0.1 mol/L = 0.04 mol

The molar ratio of NaOH to HCl is 1:1. The reacting moles of HCl are 0.04 moles.

0.04 moles of HCl are in 1.2 L. The molarity of HCl is:

M = 0.04 mol / 1.2 L = 0.033 M

4 0
3 years ago
The mass of an electron is 9.11× 10–31 kg. What is the uncertainty in the position of an electron moving at 2.00 × 106 m/s with
Kruka [31]
Just use the Heisenberg Uncertainty principle: 

<span>ΔpΔx = h/2*pi </span>

<span>Δp = the uncertainty in momentum </span>
<span>Δx = the uncertainty in position </span>
<span>h = 6.626e-34 J s (plank's constant) </span>

<span>Hint: </span>

<span>to calculate Δp use the fact that the uncertainty in the momentum is 1% (0.01) so that </span>

<span>Δp = mv*(0.01) </span>

<span>m = mass of electron </span>
<span>v = velocity of electron </span>

<span>Solve for Δx </span>

<span>Δx = h/(2*pi*Δp) </span>

<span>And that is the uncertainty in position. </span>
6 0
3 years ago
A) ¿De qué trata el cuento que leíste?<br>​
NISA [10]

No hablo espanol could you put it in English?

4 0
3 years ago
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