Propane: 3 carbon, 8 hydrogen
Carbon dioxide: 1 carbon, 2 oxygen
Answer:
The voltage is 
Explanation:
Generally the half reaction for Zn, Zn2 half-cell is mathematically represented as
⇔
(reference study academy)
and the electric potential for this is a constant value

Generally the half reaction for Al, Al3 half-cell is mathematically represented as
⇔ 
and the electric potential for this is constant value

Therefore the cell potential for an electrochemical cell is mathematically represented as

substituting values


Answer:
C.Al & E. Ag
Explanation:
These two are elements. Meaning tget are substances that cannot be broken down because they are pure. The others are considered molecules due to their ability to be broken down.
If the ratio of mass to volume is higher, then density is higher. If the ratio of mass to volume is lower, the density is lower.