Everying thing is mixture as everything have different compounds
“Star cluster” is a generic way for astronomers to refer to a group of stars that formed from the same material and are gravitationally bound for at least some period of time. There are two major types of star clusters — globular clusters and open clusters — and they are actually quite different.
This is a incomplete question. The complete question is :
Electroplating is a way to coat a complex metal object with a very thin (and hence inexpensive) layer of a precious metal, such as silver or gold. In essence the metal object is made the cathode of an electrolytic cell in which the precious metal cations are dissolved in aqueous solution. Suppose a current of 0.270 A is passed through an electroplating cell with an aqueous solution of in the cathode compartment for 72 seconds. Calculate the mass of pure silver deposited on a metal object made into the cathode of the cell. Be sure your answer has a unit symbol and the correct number of significant digits.
Answer: 0.219 g
Explanation:
According to mole concept:
1 mole of an atom contains number of particles.
We know that:
Charge on 1 electron =
To calculate the charge passed, we use the equation:
where,
I = current passed = 0.272 A
q = total charge = ?
t = time required = 72.0 s
Putting values in above equation, we get:
108 g of silver is deposited by 1 mole of electrons
96500 C deposits = 108 g of dilver
Thus 19.6 C deposits =
Thus the mass of pure silver deposited on a metal object made into the cathode of the cell is 0.0219 g