Answer: B
Explanation: concentratio = amoiunt of moles / volume
n = c/V = 0.27 mol / 0.30 l = 0.900 M
They are not chemicall combined, in order for something to be an element it has to be chemically combined. salsa and trail mix are mixtures, also mixtures can be easily picked apart, like you can seperate the pretzels and the m&ms
Answer:
False
Explanation:
When electrons move from lower to higher electron energy level they absorb the energy. When they move from higher to lower energy level they emit energy.
Answer: a) : anode
b. : cathode
c. : anode
Explanation:
Electrochemical cell is a device which converts chemical energy into electrical energy. It consist of two electrodes, anode and cathode.
Oxidation i.e. loss of electrons , which results in an increase in oxidation number occurs over anode.
Reduction i.e. gain of electrons, which results in decrease in oxidation number occurs over cathode.
a. : oxidation : anode
b. : reduction : cathode
c. : oxidation : anode