How does this demonstrate what happens in the mitochondria of our cells during cellular respiration?

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

Use the periodic table to find the molar mass of each element. molar mass h = g/mol molar mass s = g/mol molar mass o = g/mol

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these