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Molodets [167]
3 years ago
14

In an operating voltaic cell, reduction occurs

Chemistry
2 answers:
alexandr1967 [171]3 years ago
8 0
I use this to remember "an ox, red cat"

anode oxidation
cathode reduction.

so the reduction happens at the cathode
serious [3.7K]3 years ago
6 0

Answer: Option (2) is the correct answer.

Explanation:

A voltaic cell is an electrochemical cell which helps in generation of electricity by migration of ions in the process.

In a voltaic cell, both reduction and oxidation half reactions take place. In oxidation-half reaction, there is loss of electrons whereas in reduction-half reaction there is gain of electrons.

Since, it is known that an anode is negatively charged and cathode is positively charged. So, at anode oxidation takes place and at cathode reduction takes place.

Thus, we can conclude that in an operating voltaic cell, reduction occurs at the cathode.

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A particular element found in nature exists as two stable isotopes. 60.4% of the element has a mass of 68.9257amu, the rest of t
miss Akunina [59]
Mass           %abundance        # of atoms (pick 1000 sample)
68.9257         60.4%                  604
70.9249         39.6%                  396
*39.6* ( i got this by subtracting 100 as most percentage is out of 100)
*# of atoms* ( i just moved it one decimal place, then i am going to make the sample out of 1000, to get the decimal place)

Formula= total mass/ total #atoms

x= (68.9257u* 604) + (70. 9249*396)/ 1000
x- 69717. 3832/ 1000
x= 69.717amu or 69.72 amu 

if you look on the periodic table the closet element with that mass is gallium ( amu is 69.72)
6 0
3 years ago
What is the mass of 7.1 x 1021 molecules of glucose?
choli [55]

Answer:

7249.1

Explanation:

Multiply 7.1x1021= 7249.1

7 0
3 years ago
A room is a cube that measures 4 meters in each dimension. If the temperature changes from 10 C to 30 C, and the pressure decrea
Katen [24]

Answer:

More air will enter the room since the volume of the room increases.

Explanation:

We'll begin by calculating the initial volume (V₁) of the room. This can be obtained as follow

Length (L) of room = 4 m

Initial volume (V₁) =..?

V₁ = L³

V₁ = 4³

V₁ = 64 m³

Next, we shall determine if there is an increase in the volume of the room or not. This can be obtained as follow:

Data obtained from the question include:

Initial volume (V₁) = 64 m³

Initial temperature (T₁) = 10 °C + 273 = 283 K

Final temperature (T₂) = 30 °C + 373 = 303 K

Initial pressure (P₁) = 760 mmHg

Final pressure (P₂) = 718 mmHg

Final volume (V₂) =?

P₁V₁/T₁ = P₂V₂/T₂

760 × 64 / 283 = 718 × V₂ / 303

48640 / 283 = 718 × V₂ / 303

Cross multiply

283 × 718 × V₂ = 48640 × 303

203194 × V₂ = 14737920

Divide both side by 203194

V₂ = 14737920 / 203194

V₂ = 72.53 m³

SUMMARY

Initial volume (V₁) of room = 64 m³

Final volume (V₂) of room = 72.53 m³

From the calculations made above, we can see that the volume of the room increases from 64 m³ to 72.53 m³. Thus more air will enter the room since the volume of the room increases.

6 0
3 years ago
(9.0 x 108) X (3.0 x 10-4)
Fofino [41]

Answer:

25,272

Explanation:

Multiply 9.0 x 108 = 972

Multiply 3.0 x 10 = 30 - 4 = 26

Lastly, multiply 972 x 26= 25,272

3 0
3 years ago
How are microwaves produced?
Schach [20]
They are produced by vacuum tubes devices that operate on the ballistic motion of electron controlled by electric fields
7 0
3 years ago
Read 2 more answers
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