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nignag [31]
3 years ago
11

What reaction involves one element replacing an element in a compound that is from the same activity series?

Chemistry
1 answer:
Marina86 [1]3 years ago
3 0

Answer: Displacement reaction

Explanation: Displacement reaction is a reaction in which elements higher in the activity series displaces those lower in the activity series in a compound. For example, the reaction between zinc and hydrochloric acid.

Zn + 2HCl —> ZnCl2 + H2

Zn displaces H2 from acid because Zn is higher than hydrogen in the activity series.

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Indicate what happens to the concentration of Pb2+ in each half cell
Taya2010 [7]

Answer:

Your questions requires diagrams of the cell to get which one is on the left or right. However, see the attached file below

The correct answer is (d) the left half-cell will decrease in concentration; and the right half-cell will increase in concentration.

Explanation:

The concentration of the Pb2+ increases in the oxidation half cell while the concentration of the Pb2+ decreases in the reduction half cell during the reaction.

In the Left Beaker (Left half cell), their is less concentration

Pb(s) ---> Pb2+(aq) + 2 e- Concentration of Pb2+(aq) increase ; Electrons going out from this side

In the Right Beaker (right half cell), their is more concentration

Pb2+(aq) + 2 e- ---> Pb(s) Concentration of Pb2+(aq) decrease ; Electrons coming in to this side

Electrons will flow from Left to Right direction.

3 0
3 years ago
10095 m/sec to mile/ sec. 1 km = 0.6214 mile
Anarel [89]

Answer:

Explanation:

to convert any value in miles per second to meters per second, just multiply the value in miles per second by the conversion factor 1609.344. So, 10095 miles per second times 1609.344 is equal to 1.625 × 107 meters per second.

4 0
3 years ago
How many molecules are there in 5.0g of C2H5OH?
Vilka [71]
About 6.5x10^22 molecules. (5g C2H5OH)x(1 mol C2H5OH/46g C2H5OH)x(6.02x10^23 molecules C2H5OH/1 mol C2H5OH)=(3.01E24)/46=6.5x10^22. Let me know if this helped!
4 0
3 years ago
The half life of radium-226 is 1600 years. How many grams of a 0.25g sample will remain
myrzilka [38]

Answer:

Explanation:

half life = 1600 years .

m = M  x ( \frac{1}{2} )^n

m is mass of the radioactive object after n half lives , M is original mass.

n = 4800 / 1600

= 4

Putting the valus of n and M we have

m = .25 x ( \frac{1}{2} )^3

= .03125 g .

4 0
3 years ago
What 2 molecules make up the sides of dna?
riadik2000 [5.3K]
Phosphates and deoxyribose
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3 years ago
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