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4 years ago

The ability for a substance to rust is

Chemistry

1 answer:

ICE Princess25 [194]4 years ago

4 0

Answer:

i think it is letter b. rustability but not so sureeee

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It is expected that a chemical reaction will occur when copper metal is combined with aqueous zinc sulfate. Explain why there wi

REY [17]

Answer:

$E_{cell}$ = +ve, reaction is spontaneous

$E_{cell}$ = -ve, reaction is non spontaneous

$E_{cell}$ = 0, reaction is in equilibrium

Case 1: when copper metal is combined with aqueous zinc sulfate.

$Cu+ZnSO_4\rightarrow Zn+CuSO_4$

Here copper is undergoing oxidation ad thus acts as anode and zinc is undergoing reduction , thus acts as cathode.

$E^o_{cell}$ = standard electrode potential = $E^0_{cathode}- E^0_{anode}$

Where both $E^0$ are standard reduction potentials.

$E^0_{[Cu^{2+}/Cu]}= +0.34V$

$E^0_{[Zn^{2+}/Zn]}= -0.76V$

$E^0=E^0_{[Zn^{2+}/Zn]}- E^0_{[Cu^{2+}/Cu]}$

$E^0=-0.76-(+0.34)=-1.10V$

Thus as $E_{cell}$ is negative , the reaction is non spontaneous.

Case 2: when zinc metal and aqueous copper sulfate solution are combined.

$Zn+CuSO_4\rightarrow Cu+ZnSO_4$

Here zinc is undergoing oxidation ad thus acts as anode and copper is undergoing reduction , thus acts as cathode.

$E^o_{cell}$ = standard electrode potential = $E^0_{cathode}- E^0_{anode}$

Where both $E^0$ are standard reduction potentials.

$E^0_{[Cu^{2+}/Cu]}= +0.34V$

$E^0_{[Zn^{2+}/Zn]}= -0.76V$

$E^0=E^0_{[Cu^{2+}/Cu]}- E^0_{[Zn^{2+}/Zn]}$

$E^0=+0.34-(-0.76)=+1.10V$

Thus as $E_{cell}$ is positive , the reaction is spontaneous.

3 0

4 years ago

Iron is found in Earth's crust as several iron compounds. Calculate the mass in kilograms of the amount of each of the following

notka56 [123]

The mass of hematite that contains 8.0×10³ kg of iron is 2.29 × 10⁴ kg.

Iron ores refers to minerals in which iron occur in combined form found in the earth's crust.

Some ores of iron include:

hematite,
magnetite,
limonite, and
siderite.

Molar mass of hematite, Fe₂O₃ = 160 g/mol

Molar mass iron = 56 g/mol

Percent mass of iron in hematite = 56/160 = 35%

The mass of hematite that contains 8.0×10³ kg of iron = 8.0 × 10³kg/0.35 = 2.29 × 10⁴ kg.

Therefore, the mass of hematite that contains 8.0×10³ kg of iron is 2.29 × 10⁴ kg.

Learn more about iron ores at: brainly.com/question/4693242

#SPJ1

3 0

2 years ago

What is the momentum of a 5 kg object that has a velocity of 1.2 m/s?

saveliy_v [14]

Answer: the momentum is 6 Kgm/s

Explanation:

M= 5 kg

V= 1.2 m/s

Momentum = MV = 5 x 1.2 = 6 Kgm/s

3 0

3 years ago

Compare the energy requirements of a 50 year old woman and 50 year old man.

finlep [7]

Explanation:

For both men and women, the basics of a balanced diet are the same. Men have higher caloric requirements than women since they have a bigger body (both in height and weight) and more muscular mass.

So, Men needs more energy.

50 year old woman require less energy than 50 year old man.

3 0

3 years ago

The Periodic Table is organized into or by _________________. A. All of these B. Groups C. Increasing atomic number D. Propertie

il63 [147K]

Answer:

My best bet is to go with A. All of these

7 0

3 years ago