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3 years ago

What precipitate is formed when solutions of aluminum nitrate and calcium chromate are mixed?

Chemistry

1 answer:

Scrat [10]3 years ago

7 0

Answer:

Aluminum chromate, a yellow precipitate.

Explanation:

${ \bf{2Al(NO _{3} ) _{3(aq)}+ 3CaCr _{} O _{4(aq)} → { \orange{Al _{2} (CrO _{4} ) _{3(s)}} +3 Ca(NO _{3}) _{2(aq)} }}}$

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Consider the voltaic cellZn(s) + Cu{2+}(aq)--> Zn{2+}(aq)+Cu(s){}=chargeUnder standard conditions, what is the maximum electr

blondinia [14]

Answer:

Max. work done in 60 g of copper plated out is 200472.14 J

Explanation:

Given cell reaction is:

$Zn(s)+Cu^{2+} \rightarrow Zn^{2+}+Cu(s)$

Standard reduction potential of Zn electrode ( $E_{Zn^{2+}/Zn}$ ) is 0.763 V.

Standard reduction potential of Cu electrode ( $E_{Cu^{2+}/Cu}$ ) is -0.337 V.

Copper acts as cathode and Zinc acts as anode.

Cell potential (E) = E° cathode - E° anode

= 0.763 - (-0.337)

= 1.10 V

formula for the work done is as follows:

$W_{max}=-nFE$

Here, n is no. of electron involved in the reaction.

F(Faraday's constant) = 96500

In the given reaction, n = 2

$W_{max}=-nFE\\=-2 \times\ 96500 \times 1.10\\=-212300\ J/mol$

Therefore, 212300 J work is done by reducting 1 mol of copper.

Copper given is 60 g.

Molecular mass of copper is 63.54 g/mol.

$No.\ of\ mol = \frac{60\ g}{63.54\ g/mol}$

Max. work done in 60 g of copper plated out is:

$W_{max}=212300\ J/mol \times \frac{60\ g}{63.54\ g/mol} \\=200472.14\ J$

3 0

3 years ago

A cell created by cloning is genetically A identical to its parent. B identical to its stem cell. C unique because it is a mixtu

stiks02 [169]

Answer: Identical to its parent.

Explanation:

The cloning can be defined as the process by which genetically identical individuals of an organism is produced either artificially or naturally.

The cloning in case of biotechnology refers to the creating the clones of organisms or copies of cells or DNA of the parent cell that is being used in the process.

The parent cell is cloned and numerous copies is made just like that of the asexual reproduction in the nature.

Example: Dolly the sheep.

8 0

3 years ago

Which of the following statements correctly describe the trends in ionic size?

8_murik_8 [283]

the spin quantum number has values+1212 of -1212 describes the trends in ionic size.

spin quantum is denoted by (s) as it represents the electronic configuration of the atom and the ionic size also depends on the electronic configuration of the sub-shells of the atom like l, m, n, s.

ionic size increases as the electronic configuration increases because the electron adds as we move up to a higher atomic number

all the other quantum numbers may vary from atom to atom but the spin quantum number remains either +1212 or -1212. it also describes the orientation of the electrons in an atom and the axis of electrons in an atom.

learn more about quantum number here;

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8 0

1 year ago

Convert 1.6 x 10^-20 moles of Titanium to g mole <br> how many atoms of Ti do you have?

Law Incorporation [45]

12.01000022g is what i got

3 0

3 years ago

How do you calculate net force?

bogdanovich [222]

How to find net force

The net force is the vector sum of all forces act upon an object.

The formula to calculate net force is Fnet = ma
where the net force is equal to the mass of an object (in Kg) multiplied by the acceleration of the object (in meters per second squared)

You may also calculate the net force acting upon an object with Fnet = Fa + Ff
where the net force is equal to the sum of the applied force and the force of friction.

hope that helped

3 0

3 years ago