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Afina-wow [57]
2 years ago
8

Atoms with different numbers of neutrons in their nucleus are:.

Chemistry
1 answer:
bonufazy [111]2 years ago
5 0

Answer: They are referred to as isotopes, which are a form of an element that has different numbers of neutrons in their nucleus.

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The standard cell potential (e°) of a voltaic cell constructed using the cell reaction below is 0.76 v: zn (s) + 2h+ (aq) → zn2+
Temka [501]
Cell reaction overall is Zn(s)+2H+(aq)→Zn²+(aq)+H2(g).
The half-reaction of oxidation is Zn(s)→Zn²+(aq)+2E- and E°zn2+/zn=0.76v
Half reaction reduction  2H+(aq)+2∈-→H2(g) and E°H+/H2+=0.00v
Cell potential is E°cell=E°cathode-E°anode
=E°H+/H2e-E°zn2+/zn
=0.00v-(-0.76v)
=0.76v
Nernst equation
Ecell = -0.059W/N log [zn²+]PH2/[Zn][H+]²
Ecell = 0.66v
[zn²+]=1.0M
1=[Zn]
PH2=1atm
[H+]=?
n = number of moles of electrons transfered in the cell=2mol
Ecell=E°cell -0.059W/n log [Zn²+]/[Zn][H+]²
0.66v = 0.76 - 0.059W/2 log 1.0×1.0/1.0×[H+]²
0.059W/2 log 1/[H+]² = 0.76v-0.66v = 0.10v
log 1/[H+]² =0.10v×2/0.059W =3.4
-2log [H+] = 3.4
log [H+] = 1.7
[H+] =10-n
=0.020
=2.0×10-²M
The concenrtation in cathodic compartments is 2.0×10-²M
6 0
3 years ago
A weather balloon is inflated to a volume of 2.2 x 10^3 L with 37.4 g of helium. What is the density of helium in grams per lite
Ede4ka [16]
Density = mass/volume
substituting the given values :
We get :
D = 37.4 / 2.2 x 10^3
D = 0.017 grams/liter
8 0
3 years ago
The Lewis dot model of a molecule is shown. Based on the model, which of the following is true? (5 points)
vichka [17]

Answer:

B i took the test

Explanation:

6 0
2 years ago
How do simple machines make work easier?
Semmy [17]

Answer:

They increases the distance of applied force(torque)as well as they change the strenght or direction of a force(90 angle work).

Explanation:

7 0
3 years ago
Read 2 more answers
Why s orbital does not contain degenerate orbital​
Juliette [100K]
There’s no other degenerate s orbital because the there can be only one s orbital for any value of n.
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