A constant current of 1.30 amps is passed through an electrolytic cell containing OsO2. How many hours will it take to produce 45.0 grams of osmium metal from this process

9.8 h

Explanation:

From the question,

Os²⁻ - 2e⁻ = Os

From the equation above,

2 F of electron is needed to liberate 1 mole of osmium.

45 g of osmium contains 45/190 mole of osmium = 0.237 mole.

2 F ⇒ 1 mole.

2(0.237) F ⇒ 0.237 mole

0.474 F. will produce 45 g of osmium.

If         1 F = 96500 C ,

Then,  0.474 F = 45741 C,

But,

Q = it

t = Q/i Equation 1

Given: Q = 45741 C, i = 1.30 A

Substitute into equation 1

t = 45741/1.3

t = 9.8 h.

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in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.