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4 years ago

Is frying something a physical or chemical change?

2 answers:

7 0

Frying something is a Chemical change.
Take frying an egg for example. The egg white turns solid and this chemical reaction can't be reversed. This is because the egg white is made of proteins and due to the heat the enzymes get denatured meaning it can't do its function properly anymore.

Yakvenalex [24]4 years ago

6 0

i believe it is chemical change.

hope it helps

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Given the E0 values of the following two half-reactions: Zn  Zn2+ + 2e- E0 = 0.763 volt Fe  Fe2+ + 2e- E0 = 0.441 volt a) Writ

34kurt

Answer:

For a: The balanced chemical equation is written below.

For b: The corrosion of iron pipe will take place in the presence of zinc.

For c: Zinc will not protect iron pipe from corrosion.

Explanation:

For a:

The given half reaction follows:

The substance having highest positive $E^o$ potential will always get reduced and will undergo reduction reaction. Here, zinc will undergo reduction reaction will get reduced.

Oxidation half reaction: $Zn\rightarrow Zn^{2+}+2e^-;E^o_{Zn^{2+}/Zn}=-0.763V$

Reduction half reaction: $Fe+2e^-\rightarrow Fe;E^o_{Fe^{2+}/Fe}=-0.441V$

The balanced chemical equation follows:

$Fe+Zn^{2+}\rightarrow Fe^{2+}+Zn$

For b:

For a reaction to be spontaneous (thermodynamically feasible) , the standard electrode potential must be positive.

To calculate the $E^o_{cell}$ of the reaction, we use the equation:

$E^o_{cell}=E^o_{cathode}-E^o_{anode}$

Substance getting oxidized always act as anode and the one getting reduced always act as cathode.

Calculating the $E^o_{cell}$ using above equation, we get:

$E^o_{cell}=-0.441-(-0.763)=0.322V$

As, the EMF is coming out to be positive, the reaction will be thermodynamically feasible and corrosion of iron pipe will take place in the presence of zinc.

For c:

As, the EMF of the cell is positive, the zinc will not protect the iron pipe from corrosion and the reaction will take place.

4 0

3 years ago

The compound magnesium phosphate has the chemical formula Mg3(PO4)2. In this compound, phosphorous and oxygen act together as on

Lapatulllka [165]

Answer:

The 2 in the formula means that, there are 2 phosphate anions that forms the salt.

Explanation:

Magnesium phosphate is a ionic salt.

The formula indicates that 3 moles of Mg and 2 moles of anion phosphate are contained in 1 mol of compound.

3Mg²⁺ + 2PO₄⁻³ → Mg₃(PO₄)₂

The phosphate anion comes from phosphoric acid and it is generated when the acid loses the 3 protons.

H₃PO₄ → 3H⁺ + PO₄⁻³

Phosphate has a negative charge of -3, so when it bond to magnesium, which has a charge of +2, there must be 3 magnesium and 2 phosphate to make a global charge +6 -6 in the ions

6 0

4 years ago

What is a disavanege for renewable solor power

Zina [86]

1. Cost (fairly high).
2. Weather Dependent.
3. Solar Energy Storage Is Expensive.
4. Uses a Lot of Space.
5. Associated with Pollution.

6 0

3 years ago

What type of rock commonly often contains gas bubbles and the mineral(s) hornblende, muscovite, olivine, lucite, and/or plagiocl

olga_2 [115]

Scoria

Explanation:

Scoria is a rock that is commonly made up of gas bubbles and minerals such as hornblende, muscovite, olivine, lucite and or plagioclase.

Scoria is an extrusive igneous rock with a lot of cavities and vesicles indicating gas bubbles.

Scoria is product of basaltic magma.
It has nearly the same composition as basalt since it originates from it.
They silica deficient and very fine grained with holes in them.
The holes shows channels by which trapped gases are forcefully ejected out.
They are usually found associated with cindercone volcanoes.

learn more:

Volcanoes brainly.com/question/5055821

#learnwithBrainly

4 0

4 years ago

Please help with 48!

natima [27]

A granite catches fire more quickly

4 0

4 years ago