Answer:
A voltaic cell
Explanation:
A voltaic cell is a device which converts chemical energy to electrical energy. The chemical reactions that take place inside the cell causes electrons to flow from anode to cathode hence, electricity is produced. A simple voltaic cell is made by placing two different metals in contact with an electrolyte separated by a salt bridge. The cathode is the negative electrode while the anode is the positive electrode. It is also called a galvanic cell.
In a voltaic cell having a copper/copper solution half cell, reduction occurs at the cathode. Hence, at the cathode copper II ions accept two electrons and become reduced to ordinary metallic copper. This causes the blue colour of the solution to become discharged (fade) as the cell continues to function.
Answer: 90.45 joules
Explanation:
The quantity of Heat Energy (Q) absorbed by ice depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)
Thus, Q = MCΦ
In this case,
Q = ?
Mass of ice = 4.5g
C = 2.010 J/g°C (Though not provided, but the specific heat capacity of ice is 2.010 J/g°C)
Φ = (Final temperature - Initial temperature)
= 10°C - 0°C = 10°C
Then, Q = MCΦ
Q = 4.5g x 2.010 J/g°C x 10°C
Q = 90.45 joules
Thus, 90.45 joules of heat is absorbed by ice.
To get the conjugate base of an acid, subtract an H+ ion.
Therefore the conjugate base of HCI is, CI-
An example of a land form from magma is B. Lava Plateau.
