How much more powerful is a magnitude 8 earthquake than a magnitude 4 earthquake? A. 4 times B.100 times C.1000 times D.10000 times

Determine the reaction and balance the following equations urgent due in the morning

What does the symbol (–hfus) indicate in a phase change?

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it