B. All atoms of silver have the same atomic number but different numbers of neutrons in the nucleus.
Answer:
162.7miles/hr
Explanation:
Given parameters:
Distance covered by the train = 813.5miles
Time taken = 5hours
Unknown:
Speed of the train = ?
Solution:
Speed is a physical quantity.
It is mathematically expressed as;
Speed =
So, input parameters and solve;
Speed = = 162.7miles/hr
It has different moleculs sorry I am guessing
Answer: the answer is D im pretty sure
Explanation: