Answer:
B. the atomic weight of the element
Explanation:
since it talks about mass i think weight
8.9 g + 90 g = 98.9 Copper has a density
Answer:
if you touch a hot stove, the nerves in your skin shoot a message of pain to your brain. The brain then sends a message back telling the muscles in your hand to pull away.
Explanation:
It became the model for the Chicago income and property tax program. He used this plan to avoid prosecution for the Chicago fire. This contest-winning design opened Chicago streets to new forms of transportation.
