Answer: 1870 g
mass of gold = 1.87 kg x 1000 = 1870 g
Answer:-
Carbon cannot reduce sodium, magnesium and calcium to their respective metals because carbon is lower than them in the electrochemical series.
Only metals higher in the electrochemical series can displace metals placed lower.
Sodium, magnesium and calcium are obtained from their salts by electrolysis of the salts.
Sodium Chloride is the sodium salt used. Sodium is deposited at cathode.
Chlorine gas is produced from the process.
Cathode: 2Na+ + 2e- --> 2Na (Reduction)
Anode: 2Cl- --> Cl2 + 2e- (Oxidation)
Potassium and Calcium are two other metals that can be extracted by the same method
Lets do process of elimination!
A. Breaking glass - That is a psychical change because if you break it, it is still glass. It didn't change to another substance.
B. Melting ice on a windshield - During the melting process, there is no chemical change, and therefore, no new substance is created.
C. Burning gasoline - When gas burns it usually combines with oxygen to give carbon dioxide, water etc. It is a chemical change.
D. Denting a bumper - The bumper is still a bumper, only thing is it has a dent in it. The properties did not change, meaning no chemical change.