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3 years ago

5. Base your answer to the following question on the

Chemistry

2 answers:

KatRina [158]3 years ago

7 0

The answer is B) is the correct answer

elixir [45]3 years ago

4 0

Answer:

B) 2Crº + 6e- --> 2Cr3+

Explanation:

The process of oxidation is where electrons are lost. Thus, out of the 2 ions that change charge(Cr and Cu), we must choose the one where the oxidation number increases(which means electrons are lost). Cr goes from an oxidation number of 0 to an oxidation number of 3+, while Cu goes from an oxidation number of 2+ to 0. Thus, we are looking at the half reaction for Cr. Half reactions never have subtracting electrons, so the answer must be B. I am assuming that last plus should be a -->

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In a titration of 0.35 M HCl and 0.35 M NaOH, how much NaOH should be added to 45.0 ml of HCl to completely neutralize the acid?

Bezzdna [24]

It would be the same amount. So, 45 ml of NaOH is required to be added to the 45 ml of HCI to neutralize the acid fully. Here is a brief calculation:

Firstly, here is your formula: M(HCI) x V(HCI) = M(NaOh) x V(NaOH)
With the values put in: 0.35 x 45 = 0.35 x V(NaOH)
= 45 ml.
There is 45 ml of V(NaOH)

Let me know if you need anything else. :)

- Dotz

6 0

3 years ago

A reasonable pka for a weak base is: 10.3 0.9 5.8 7.4 13.1

andriy [413]

Answer:

0.9

Explanation:

The pka represents the force by which the molecules need to dissociate for the acids ,

Hence , lower the pka stronger will be the acid and that therefore will dissociate completely and vice versa , for a weak acid higher the pka .

And in case of a base , it will be completely reversed , lower pKa , weaker base ,

and higher pKa , stronger base .

From the data of the question ,

0.9 is the lowest value of the pKa , hence , weakest base .

7 0

3 years ago

Answer the amount of miles of O2

lord [1]

Answer:

Explanation:

the answer is 3 because it is 3 for the o2 so 3 you have to pay more attention for the small ditails

5 0

2 years ago

The formula for lithium oxide is A) Li2O B) LiO2 C) LiO D) Li2O3

Greeley [361]

Li2O is the formula for lithium oxide

4 0

3 years ago

Read 2 more answers

State the total number of electrons occupying all the p- orbitals in one atom of chlorine .

V125BC [204]

Answer:A chlorine atom in its ground state has a total of seven electrons in orbitals related to the atoms third energy level.

Explanation:

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3 years ago