Answer:
-4
Explanation:
PLz give me brainliest I worked hard thank u
When waters salinity increases it’s freezing point will decrease. This is one of the reasons why people salt the roads after a snow storm.
- Light energy from sun is converted into electrical energy in a solar cell.
- Electrical energy is stored as chemical energy in the solar cell.
- Chemical energy is converted back into electrical energy at night.
- Electrical energy is converted into light energy from the street lamp.
For #4 first find the molar mass(M) of copper then use that and the mass (m) n=m/M to find moles(n) using moles and the volumes find the concentration using c=n/V
