Answer:
Comets are made of ice, dust, and rocky material. Asteroids are made of rock and metal material.
Explanation:
thats how they are different from each other
So really you only need to answer the first one because you have more than enough og everything. 2×(what)=14 then that will be your answer
Answer: 
is the limiting reagent
Explanation:
To calculate the moles :
The balanced chemical reaction is :
According to stoichiometry :
1 moles of require = 2 moles of 
Thus 0.625 moles of will require=
of
Thus is the limiting reagent as it limits the formation of product and is the excess reagent as it is present more than the required amount.
No of protons=107+1=108
No. Of neutrons=158
Mass no. =166
