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4 years ago

Convert the following to moles 5.70 grams of ZrF4

Chemistry

1 answer:

marysya [2.9K]4 years ago

5 0

5.70 g ZrF4* (1 mol ZrF4/ 167.2 g ZrF4)= 0.0341 mol ZrF4.

The final answer is 0.0341 mol ZrF4~

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Consider a galvanic cell based on the reaction Al^3+_(aq) + Mg_(s) rightarrow Al_(s) + Mg^2+ _(aq) The half-reactions are Al^3+

grin007 [14]

Answer: The standard cell potential of the cell is -0.71 V

Explanation:

The half reactions follows:

Oxidation half reaction: $Mg\rightarrow Mg^{2+}+2e^-;E^o_{Mg^{2+}/Mg}=-2.37V$ ( × 3)

Reduction half reaction: $Al^{3+}(aq.)+3e^-\rightarrow Al(s);E^o_{Al^{3+}/Al}=-1.66V$ ( × 2)

The balanced cell reaction follows:

$2Al^{3+}(aq.)+3Mg(s)\rightarrow 2Al(s)+3Mg^{2+}(aq.)$

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.

Putting values in above equation, we get:

$E^o_{cell}=-2.37-(-1.66)=-0.71V$

Hence, the standard cell potential of the cell is -0.71 V

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3 years ago

Using knowledge of intermolecular forces, explain why the yellow food coloring mixed with the water and the acetone was able to

Papessa [141]

The yellow coloring is a polar substance hence it dissolve in water. Blue dye is nonpolar hence it dissolves in less polar acetone.

In chemistry, there is a general rule that like dissolves like. A substance can only dissolve in another if there is some kind of intermolecular interaction between the substances.

The yellow food coloring is a polar substance hence it is able to dissolve in water which is a polar solvent. The blue dye is a nonpolar substance hence it dissolve in acetone which is a less polar solvent.

Learn more: brainly.com/question/9847214

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3 years ago

What is the OH- concentration of a solution whose pH is 12.40?

Elanso [62]

PH + pOH = pKw = 14

12.40 + pOH = 14

pOH = 14 - 12.40

pOH = 1.6

[OH⁻] = $10 ^{-pOH}$

[OH⁻] = $10 ^{-1.6}$

[OH⁻] = 2.5x10⁻² M

hope this helps!

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3 years ago

We're doing a lab in chemistry and we have to inflate a ziplock bag. So we need to find the volume of a ziplock bag and i have n

Harrizon [31]

Measure the ziplock bag.
LxWxH= volume

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4 years ago

2+5*6 how to get over someone me and him were together for 10 months

NeX [460]

You should should on yourself, treat yourself

Hangout with your friends and family, distract yourself

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3 years ago