Answer:
B as all the forces cancel out
Explanation:
20-20=0
25-25=0
Explanation:
4 x 6.02 x 10²³ = 2.41 x 10²⁴
Examination by a test; experiment, as in chemistry, metallurgy, etc.
Answer:
because it is two substances reacting together to create a new substance
Explanation:
when iron rusts, iron molecules react with the oxygen molecules creating iron oxide aka rust.