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bazaltina [42]
3 years ago
9

In a zinc-copper cell, zn | zn2+ (1m || cu2+ (1m | cu, which electrode is negative?

Chemistry
1 answer:
Daniel [21]3 years ago
6 0
Zn(s) is the correct answer

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ivanzaharov [21]

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3 0
2 years ago
Write a net ionic equation for the overall reaction that occurs when aqueous solutions of nitrous acid and sodium hydroxide are
Bess [88]

Answer:

H+(aq) +  OH-(aq) → H2O(l)

Explanation:

Step 1: Data given

nitrious acid = HNO3

sodium hydroxide = NaOH

Step 2: The unbalance equation

HNO3(aq) + NaOH(aq) →NaNO3(aq) + H2O(l)

The net ionic equation, for which spectator ions are omitted - remember that spectator ions are those ions located on both sides of the equation - will , after canceling those spectator ions in both side (Ba^2+ and Br-), look like this:

H+(aq) + NO3-(aq) + Na+(aq) + OH-(aq) →Na+(aq) +NO3(aq) + H2O(l)

H+(aq) +  OH-(aq) → H2O(l)

7 0
3 years ago
Consider the half reaction below.
Radda [10]
Answer: the second option: <span>Iron is being oxidized
</span>

Explanation:

1) Oxidation is the increase of the oxidation state (number) due to the loss of electrons.

2) In the given reaction, you can see that in the left side the atom is Fe. 

When an element (atom) is not combined (or combined with it self) its oxidation state is 0. 

3) In the right side of the given equation you that iron is now in form of cation with charge 2+: Fe²⁺.

That means that the new oxidation state of the element is 2+.

4) This change in the oxidation state, of course, is accompanied by the loss of the two electrons: 2e⁻.

5) Conclusion: the iron has oxidized by losing two electrons and increasing its oxidation state from 0 to 2+.
<span></span>
7 0
3 years ago
Is calcium carbonate a compound element or mixture?
uysha [10]

It's a compound because it's formed from an ionic bond between calcium and carbon so it's an ionic compound

7 0
3 years ago
Wetlands help to prevent flooding. Please select the best answer from the choices provided T F
balu736 [363]
True, wetlands help to prevent flooding.
8 0
3 years ago
Read 2 more answers
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