Answer:
1. 2.63x10^6
2. 39.2
Both answers have been rounded
The formula of chalcopyrite is CuFeS₂.
The molar mass of chalcopyrite - 183.5 g/mol
The mass of Cu in 1 mol of chalcopyrite is - 63.5 g
When 183.5 g of chalcopyrite is mined, the mass of Cu obtained - 63.5 g
So if 63.g of Cu is needed mass of chalcopyrite required - 183.5 g
Then to gain 370 g of pure Cu - mass of chalcopyrite needed -183.5/63.5 x 370
therefore mass of chalcopyrite to be mined - 1069.21 g
In the apparatus of the electrochemical cell, the seawater is an example of an electrolyte.
<h3>What is an electrolyte?</h3>
An electrolyte is a component of the electrochemical cell that is a solution of solvent or water that contains dissolved ions.
The salts of sodium, chloride, and potassium are the main components of seawater and a great electrolyte.
Therefore seawater is an example of an electrolyte.
Learn more about electrolytes here:
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Answer:
b melting
Explanation:
The phase change the substance is undergoing is from solid to liquid and this is called melting.
- To understand this process, we need to know the the substance changing.
- A substance that contains particles that are not easily compressed and packed is a solid.
- Solids have fixed shapes and volumes.
- Liquids can easily flow although they cannot also be easily compressed.
The phase change from solid to liquid is facilitated by a melting process.
Valence electrons largely determine the chemical properties of an element.
