Iron and chlorine
For every iron there are 3 chlorine.
Answer: The amount of water formed is 12 moles
Explanation: Please see the attachments below
It takes the Earth 24 hours to rotate on its axis and this rotation is what causes there to be days and nights.
First we have to understand what a half life is. A half life is a measure of time when the amount of a certain object is 50% of the original amount. Hence the answer for this is letter A. The initial amount is 100. fifty percent of 100 is 50 and that happens after 15 hours. Hence, 15 hours is the half life period.
