Abiotic things are like rocks...dirt...water vs. biotic is living things or something that was living
3.65 X 10 to the power of 8
Ca +2
At -1
In +3
Sr +2
Ra +2
Fr +1
Ba +2
As -3
Carbon molar mass=12
carbon mass in the above question =6
mole=number of atoms/6.02x10²³
6/12= number of atoms/6.02x10²³
number of atoms=1/2 x6.02x10²³
number of atoms= 6.02 x10²³/2
number of atoms=3.01x10²³
B. The surface of a silver cup turns black when it is exposed to air.
