C because D stands for delta therefore it signifies change
The final product cannot be converted back to the original ingredients. This is why baking a chocolate chip cookie is a chemical reaction.
Answer:
10moles
Explanation:
mole ratio = 8:16
therefore
1 mole Li2S forms 2 moles Li
when 5 moles Li2S reacts
5 moles Li2S = 5 x 2 moles Li
= 10 moles Li