Answer:
A. to cure human diseases
Explanation:
Answer:
d. oxygen (O2) is the answer
It was used from the Bronze Age(3000 BC) and tin was used in the bronze.
Answer : The mass of 7.0 m chain is, 15.12 kg
Explanation :
As we are given that,
The weight of the chain per unit length = 2.16 kg/m
Now we have to determine the mass of chain for 7.0 m length.
As, the mass of 1 m length of chain = 2.16 kg
So, the mass of 7.0 m length of chain = 
= 15.12 kg
Therefore, the mass of 7.0 m chain is, 15.12 kg
Answer:
Be
Explanation:
Alkaline earth metals are in the 2A group. Be - 9.01 g/mol