Answer:
67.93 kg.
Explanation:
See the attached pictures for detailed explanation.
Answer:
Faster hydrogen burning means the star will grow larger and more luminous to allow the extra energy created to escape
I know that we can find how old the Earth is by knowing how much uranium ultimately decayed into lead. Uranium-238 has a very long to decay, about 4.5 billion years. So that is how we are able to understand how old the Earth is.
Answer:
Chlorine and Bromine are in the same group