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3 years ago

What do you think caused the balloon to expand

2 answers:

5 0

Pressure on the inside of the balloon was greater than the pressure on the outside of the balloon so it pushed out until the pressures equalized.

IgorLugansk [536]3 years ago

3 0

Balloons expand because of the pressure of the air being blown in to it is pushing against the side which causes the elastic in the balloon to expand.

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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

__________ are composed of two or more covalently bonded atoms.

polet [3.4K]

Answer:

i think it is molecules.

Explanation:

4 0

3 years ago

Read 2 more answers

What happens when grapes get fermented

ValentinkaMS [17]

When grapes become fermented, they turn into wine.

6 0

3 years ago

4. Think of the solids and liquids that you encounter every day. In what ways are solids and liquids similar? In what ways are t

Taya2010 [7]

Answer:

They both are the same thing which is water but they are just in different forms.

Explanation:

A solid is water that is frozen and a liquid is just water.

3 0

2 years ago

The vapor pressure of benzene is 100.0 mmhg at 26.1°c. calculate the vapor pressure of a solution containing 28.2 g of camphor (

FrozenT [24]

<span>Answer: Moles C10H16O = 24.6 g/ 153.23 g/mol = 0.161 Moles benzene = 98.5 g / 78.1121 g/mol = 1.26 Mole fraction benzene = 1.26 / 1.26 + 0.161 = 0.887 vapor pressure = 100 x 0.887 = 88.7 mm Hg</span>

5 0

3 years ago